55631051 has 4 divisors (see below), whose sum is σ = 63578352. Its totient is φ = 47683752.

The previous prime is 55631039. The next prime is 55631053. The reversal of 55631051 is 15013655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55631051 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 55631051.

It is not an unprimeable number, because it can be changed into a prime (55631053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3973640 + ... + 3973653.

It is an arithmetic number, because the mean of its divisors is an integer number (15894588).

Almost surely, 2^55631051 is an apocalyptic number.

55631051 is a deficient number, since it is larger than the sum of its proper divisors (7947301).

55631051 is an equidigital number, since it uses as much as digits as its factorization.

55631051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7947300.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 55631051 is about 7458.6225940183. The cubic root of 55631051 is about 381.7441773721.

The spelling of 55631051 in words is "fifty-five million, six hundred thirty-one thousand, fifty-one".