51615423 has 6 divisors (see below), whose sum is σ = 74555624. Its totient is φ = 34410276.

The previous prime is 51615401. The next prime is 51615439. The reversal of 51615423 is 32451615.

51615423 is a `hidden beast` number, since 5 + 1 + 615 + 42 + 3 = 666.

It is not a de Polignac number, because 51615423 - 2⁶ = 51615359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2867515 + ... + 2867532.

Almost surely, 2^51615423 is an apocalyptic number.

51615423 is a deficient number, since it is larger than the sum of its proper divisors (22940201).

51615423 is a wasteful number, since it uses less digits than its factorization.

51615423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735053 (or 5735050 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51615423 is about 7184.3874477926. The cubic root of 51615423 is about 372.3286853934.

The spelling of 51615423 in words is "fifty-one million, six hundred fifteen thousand, four hundred twenty-three".