54615813 has 32 divisors (see below), whose sum is σ = 85935360. Its totient is φ = 30205440.

The previous prime is 54615809. The next prime is 54615817. The reversal of 54615813 is 31851645.

It is an interprime number because it is at equal distance from previous prime (54615809) and next prime (54615817).

It is not a de Polignac number, because 54615813 - 2² = 54615809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54615817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197031 + ... + 197307.

It is an arithmetic number, because the mean of its divisors is an integer number (2685480).

Almost surely, 2^54615813 is an apocalyptic number.

It is an amenable number.

54615813 is a deficient number, since it is larger than the sum of its proper divisors (31319547).

54615813 is a wasteful number, since it uses less digits than its factorization.

54615813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557.

The product of its digits is 14400, while the sum is 33.

The square root of 54615813 is about 7390.2512135921. The cubic root of 54615813 is about 379.4076945208.

The spelling of 54615813 in words is "fifty-four million, six hundred fifteen thousand, eight hundred thirteen".