51542537 has 4 divisors (see below), whose sum is σ = 51710736. Its totient is φ = 51374340.

The previous prime is 51542531. The next prime is 51542567. The reversal of 51542537 is 73524515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51542537 - 2⁶ = 51542473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51542531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83639 + ... + 84252.

It is an arithmetic number, because the mean of its divisors is an integer number (12927684).

Almost surely, 2^51542537 is an apocalyptic number.

It is an amenable number.

51542537 is a deficient number, since it is larger than the sum of its proper divisors (168199).

51542537 is a wasteful number, since it uses less digits than its factorization.

51542537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168198.

The product of its digits is 21000, while the sum is 32.

The square root of 51542537 is about 7179.3131287053. The cubic root of 51542537 is about 372.1533480580.

The spelling of 51542537 in words is "fifty-one million, five hundred forty-two thousand, five hundred thirty-seven".