51542015 has 16 divisors (see below), whose sum is σ = 71658048. Its totient is φ = 34857216.

The previous prime is 51541991. The next prime is 51542027. The reversal of 51542015 is 51024515.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51542015 - 2⁸ = 51541759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7532 + ... + 12641.

It is an arithmetic number, because the mean of its divisors is an integer number (4478628).

Almost surely, 2^51542015 is an apocalyptic number.

51542015 is a deficient number, since it is larger than the sum of its proper divisors (20116033).

51542015 is a wasteful number, since it uses less digits than its factorization.

51542015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20258.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 51542015 is about 7179.2767741605. The cubic root of 51542015 is about 372.1520917189.

The spelling of 51542015 in words is "fifty-one million, five hundred forty-two thousand, fifteen".