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230454661 = 1509115271
BaseRepresentation
bin11011011110001…
…11010110000101
3121001122022100211
431233013112011
5432444022121
634511235421
75465555323
oct1557072605
9531568324
10230454661
111090a3aa8
1265218b71
133898b208
142286cd13
1515372ce1
hexdbc7585

230454661 has 4 divisors (see below), whose sum is σ = 230485024. Its totient is φ = 230424300.

The previous prime is 230454659. The next prime is 230454671. The reversal of 230454661 is 166454032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 230454661 - 21 = 230454659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230454671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7456 + ... + 22726.

It is an arithmetic number, because the mean of its divisors is an integer number (57621256).

Almost surely, 2230454661 is an apocalyptic number.

It is an amenable number.

230454661 is a deficient number, since it is larger than the sum of its proper divisors (30363).

230454661 is a wasteful number, since it uses less digits than its factorization.

230454661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30362.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 230454661 is about 15180.7332168114. The cubic root of 230454661 is about 613.0960226832.

It can be divided in two parts, 2304 and 54661, that added together give a palindrome (56965).

The spelling of 230454661 in words is "two hundred thirty million, four hundred fifty-four thousand, six hundred sixty-one".

Divisors: 1 15091 15271 230454661