55597331 has 8 divisors (see below), whose sum is σ = 56600064. Its totient is φ = 54600840.

The previous prime is 55597313. The next prime is 55597343. The reversal of 55597331 is 13379555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55597331 is a prime.

It is a super-2 number, since 2×55597331² = 6182126428647122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55591331) 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 7 ways as a sum of consecutive naturals, for example, 18710 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (7075008).

Almost surely, 2^55597331 is an apocalyptic number.

55597331 is a deficient number, since it is larger than the sum of its proper divisors (1002733).

55597331 is a wasteful number, since it uses less digits than its factorization.

55597331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121.

The product of its digits is 70875, while the sum is 38.

The square root of 55597331 is about 7456.3617803859. The cubic root of 55597331 is about 381.6670321140.

The spelling of 55597331 in words is "fifty-five million, five hundred ninety-seven thousand, three hundred thirty-one".