55251931 has 16 divisors (see below), whose sum is σ = 66723840. Its totient is φ = 44745120.

The previous prime is 55251899. The next prime is 55251941. The reversal of 55251931 is 13915255.

It is not a de Polignac number, because 55251931 - 2⁵ = 55251899 is a prime.

It is a super-2 number, since 2×55251931² = 6105551758457522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55251893 and 55251902.

It is not an unprimeable number, because it can be changed into a prime (55251941) 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, 6646 + ... + 12436.

It is an arithmetic number, because the mean of its divisors is an integer number (4170240).

Almost surely, 2^55251931 is an apocalyptic number.

55251931 is a deficient number, since it is larger than the sum of its proper divisors (11471909).

55251931 is a wasteful number, since it uses less digits than its factorization.

55251931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5874.

The product of its digits is 6750, while the sum is 31.

The square root of 55251931 is about 7433.1642656408. The cubic root of 55251931 is about 380.8750172740.

The spelling of 55251931 in words is "fifty-five million, two hundred fifty-one thousand, nine hundred thirty-one".