53661001 has 4 divisors (see below), whose sum is σ = 55994112. Its totient is φ = 51327892.

The previous prime is 53660983. The next prime is 53661011. The reversal of 53661001 is 10016635.

53661001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53661001 - 2⁹ = 53660489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53661011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166521 + ... + 1166566.

It is an arithmetic number, because the mean of its divisors is an integer number (13998528).

Almost surely, 2^53661001 is an apocalyptic number.

It is an amenable number.

53661001 is a deficient number, since it is larger than the sum of its proper divisors (2333111).

53661001 is a wasteful number, since it uses less digits than its factorization.

53661001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333110.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 53661001 is about 7325.3669532659. The cubic root of 53661001 is about 377.1837059407.

Adding to 53661001 its reverse (10016635), we get a palindrome (63677636).

It can be divided in two parts, 53 and 661001, that multiplied together give a palindrome (35033053).

The spelling of 53661001 in words is "fifty-three million, six hundred sixty-one thousand, one".