55631207 has 16 divisors (see below), whose sum is σ = 58662912. Its totient is φ = 52708320.

The previous prime is 55631201. The next prime is 55631209. The reversal of 55631207 is 70213655.

It is a cyclic number.

It is not a de Polignac number, because 55631207 - 2¹⁸ = 55369063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55631207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55631201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333038 + ... + 333204.

It is an arithmetic number, because the mean of its divisors is an integer number (3666432).

Almost surely, 2^55631207 is an apocalyptic number.

55631207 is a deficient number, since it is larger than the sum of its proper divisors (3031705).

55631207 is a wasteful number, since it uses less digits than its factorization.

55631207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 55631207 is about 7458.6330517059. The cubic root of 55631207 is about 381.7445341994.

The spelling of 55631207 in words is "fifty-five million, six hundred thirty-one thousand, two hundred seven".