55231537 has 8 divisors (see below), whose sum is σ = 58246400. Its totient is φ = 52227504.

The previous prime is 55231489. The next prime is 55231549. The reversal of 55231537 is 73513255.

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

It is not a de Polignac number, because 55231537 - 2¹⁵ = 55198769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55231499 and 55231508.

It is not an unprimeable number, because it can be changed into a prime (55231567) 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, 9139 + ... + 13927.

It is an arithmetic number, because the mean of its divisors is an integer number (7280800).

Almost surely, 2^55231537 is an apocalyptic number.

It is an amenable number.

55231537 is a deficient number, since it is larger than the sum of its proper divisors (3014863).

55231537 is a wasteful number, since it uses less digits than its factorization.

55231537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5415.

The product of its digits is 15750, while the sum is 31.

The square root of 55231537 is about 7431.7923141057. The cubic root of 55231537 is about 380.8281500070.

The spelling of 55231537 in words is "fifty-five million, two hundred thirty-one thousand, five hundred thirty-seven".