53955891 has 24 divisors (see below), whose sum is σ = 85303296. Its totient is φ = 32592240.

The previous prime is 53955883. The next prime is 53955899. The reversal of 53955891 is 19855935.

53955891 is a `hidden beast` number, since 5 + 3 + 9 + 558 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (53955883) and next prime (53955899).

It is not a de Polignac number, because 53955891 - 2³ = 53955883 is a prime.

It is a super-2 number, since 2×53955891² = 5822476347207762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53955899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37206 + ... + 38628.

It is an arithmetic number, because the mean of its divisors is an integer number (3554304).

Almost surely, 2^53955891 is an apocalyptic number.

53955891 is a deficient number, since it is larger than the sum of its proper divisors (31347405).

53955891 is a wasteful number, since it uses less digits than its factorization.

53955891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823 (or 1820 counting only the distinct ones).

The product of its digits is 243000, while the sum is 45.

The square root of 53955891 is about 7345.4673779141. The cubic root of 53955891 is about 377.8733723833.

The spelling of 53955891 in words is "fifty-three million, nine hundred fifty-five thousand, eight hundred ninety-one".