55553631 has 16 divisors (see below), whose sum is σ = 84768768. Its totient is φ = 31701600.

The previous prime is 55553629. The next prime is 55553639. The reversal of 55553631 is 13635555.

It is not a de Polignac number, because 55553631 - 2¹ = 55553629 is a prime.

It is a super-2 number, since 2×55553631² = 6172411834568322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55553592 and 55553601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55553639) 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, 20146 + ... + 22736.

It is an arithmetic number, because the mean of its divisors is an integer number (5298048).

Almost surely, 2^55553631 is an apocalyptic number.

55553631 is a deficient number, since it is larger than the sum of its proper divisors (29215137).

55553631 is a wasteful number, since it uses less digits than its factorization.

55553631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622.

The product of its digits is 33750, while the sum is 33.

The square root of 55553631 is about 7453.4308207697. The cubic root of 55553631 is about 381.5670080013.

The spelling of 55553631 in words is "fifty-five million, five hundred fifty-three thousand, six hundred thirty-one".