55911951 has 10 divisors (see below), whose sum is σ = 83522912. Its totient is φ = 37274580.

The previous prime is 55911943. The next prime is 55911967. The reversal of 55911951 is 15911955.

55911951 is a `hidden beast` number, since 5 + 591 + 19 + 51 = 666.

55911951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55911951 - 2³ = 55911943 is a prime.

It is a super-2 number, since 2×55911951² = 6252292529252802, 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 (55911901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 345055 + ... + 345216.

Almost surely, 2^55911951 is an apocalyptic number.

55911951 is a deficient number, since it is larger than the sum of its proper divisors (27610961).

55911951 is an equidigital number, since it uses as much as digits as its factorization.

55911951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690283 (or 690274 counting only the distinct ones).

The product of its digits is 10125, while the sum is 36.

The square root of 55911951 is about 7477.4294379820. The cubic root of 55911951 is about 382.3856174710.

The spelling of 55911951 in words is "fifty-five million, nine hundred eleven thousand, nine hundred fifty-one".