55361831 has 16 divisors (see below), whose sum is σ = 64668480. Its totient is φ = 46414080.

The previous prime is 55361819. The next prime is 55361833. The reversal of 55361831 is 13816355.

It is a cyclic number.

It is not a de Polignac number, because 55361831 - 2¹⁰ = 55360807 is a prime.

It is a super-2 number, since 2×55361831² = 6129864663345122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55361833) 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, 135155 + ... + 135563.

It is an arithmetic number, because the mean of its divisors is an integer number (4041780).

Almost surely, 2^55361831 is an apocalyptic number.

55361831 is a deficient number, since it is larger than the sum of its proper divisors (9306649).

55361831 is a wasteful number, since it uses less digits than its factorization.

55361831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its digits is 10800, while the sum is 32.

The square root of 55361831 is about 7440.5531380402. The cubic root of 55361831 is about 381.1273791451.

The spelling of 55361831 in words is "fifty-five million, three hundred sixty-one thousand, eight hundred thirty-one".