55972961 has 12 divisors (see below), whose sum is σ = 63838320. Its totient is φ = 48667080.

The previous prime is 55972957. The next prime is 55972963. The reversal of 55972961 is 16927955.

It is a happy number.

It is not a de Polignac number, because 55972961 - 2² = 55972957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55972963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1010 + ... + 10628.

It is an arithmetic number, because the mean of its divisors is an integer number (5319860).

Almost surely, 2^55972961 is an apocalyptic number.

It is an amenable number.

55972961 is a deficient number, since it is larger than the sum of its proper divisors (7865359).

55972961 is a wasteful number, since it uses less digits than its factorization.

55972961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9676 (or 9653 counting only the distinct ones).

The product of its digits is 170100, while the sum is 44.

The square root of 55972961 is about 7481.5079362385. The cubic root of 55972961 is about 382.5246507530.

It can be divided in two parts, 5597 and 2961, that added together give a palindrome (8558).

The spelling of 55972961 in words is "fifty-five million, nine hundred seventy-two thousand, nine hundred sixty-one".