231151461 has 4 divisors (see below), whose sum is σ = 308201952. Its totient is φ = 154100972.

The previous prime is 231151451. The next prime is 231151477. The reversal of 231151461 is 164151132.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 231151461 - 2⁹ = 231150949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231151411) 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, 38525241 + ... + 38525246.

It is an arithmetic number, because the mean of its divisors is an integer number (77050488).

Almost surely, 2^231151461 is an apocalyptic number.

It is an amenable number.

231151461 is a deficient number, since it is larger than the sum of its proper divisors (77050491).

231151461 is an equidigital number, since it uses as much as digits as its factorization.

231151461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77050490.

The product of its digits is 720, while the sum is 24.

The square root of 231151461 is about 15203.6660381633. Note that the first 3 decimals coincide. The cubic root of 231151461 is about 613.7133175909.

The spelling of 231151461 in words is "two hundred thirty-one million, one hundred fifty-one thousand, four hundred sixty-one".