55252831 has 4 divisors (see below), whose sum is σ = 57655152. Its totient is φ = 52850512.

The previous prime is 55252811. The next prime is 55252843. The reversal of 55252831 is 13825255.

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

It is a cyclic number.

It is not a de Polignac number, because 55252831 - 2⁹ = 55252319 is a prime.

It is a super-2 number, since 2×55252831² = 6105750667029122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55252793 and 55252802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55252811) 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, 1201126 + ... + 1201171.

It is an arithmetic number, because the mean of its divisors is an integer number (14413788).

Almost surely, 2^55252831 is an apocalyptic number.

55252831 is a deficient number, since it is larger than the sum of its proper divisors (2402321).

55252831 is a wasteful number, since it uses less digits than its factorization.

55252831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402320.

The product of its digits is 12000, while the sum is 31.

The square root of 55252831 is about 7433.2248048878. The cubic root of 55252831 is about 380.8770852901.

The spelling of 55252831 in words is "fifty-five million, two hundred fifty-two thousand, eight hundred thirty-one".