51642039 has 16 divisors (see below), whose sum is σ = 73267200. Its totient is φ = 32242560.

The previous prime is 51642029. The next prime is 51642043. The reversal of 51642039 is 93024615.

It is not a de Polignac number, because 51642039 - 2²⁵ = 18087607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51641997 and 51642015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8362 + ... + 13160.

It is an arithmetic number, because the mean of its divisors is an integer number (4579200).

Almost surely, 2^51642039 is an apocalyptic number.

51642039 is a deficient number, since it is larger than the sum of its proper divisors (21625161).

51642039 is a wasteful number, since it uses less digits than its factorization.

51642039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 51642039 is about 7186.2395590462. The cubic root of 51642039 is about 372.3926727111.

The spelling of 51642039 in words is "fifty-one million, six hundred forty-two thousand, thirty-nine".