55417931 has 2 divisors, whose sum is σ = 55417932. Its totient is φ = 55417930.

The previous prime is 55417919. The next prime is 55417939. The reversal of 55417931 is 13971455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55417931 - 2⁶ = 55417867 is a prime.

It is a super-2 number, since 2×55417931² = 6142294152641522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55417891 and 55417900.

It is not a weakly prime, because it can be changed into another prime (55417939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27708965 + 27708966.

It is an arithmetic number, because the mean of its divisors is an integer number (27708966).

Almost surely, 2^55417931 is an apocalyptic number.

55417931 is a deficient number, since it is larger than the sum of its proper divisors (1).

55417931 is an equidigital number, since it uses as much as digits as its factorization.

55417931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 35.

The square root of 55417931 is about 7444.3220644999. The cubic root of 55417931 is about 381.2560720703.

The spelling of 55417931 in words is "fifty-five million, four hundred seventeen thousand, nine hundred thirty-one".