51402537 has 24 divisors (see below), whose sum is σ = 76467456. Its totient is φ = 33256896.

The previous prime is 51402521. The next prime is 51402551. The reversal of 51402537 is 73520415.

It is a happy number.

It is not a de Polignac number, because 51402537 - 2⁴ = 51402521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51402537.

It is not an unprimeable number, because it can be changed into a prime (51402037) 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 23 ways as a sum of consecutive naturals, for example, 57508 + ... + 58394.

It is an arithmetic number, because the mean of its divisors is an integer number (3186144).

Almost surely, 2^51402537 is an apocalyptic number.

It is an amenable number.

51402537 is a deficient number, since it is larger than the sum of its proper divisors (25064919).

51402537 is a wasteful number, since it uses less digits than its factorization.

51402537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1074 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 51402537 is about 7169.5562624196. The cubic root of 51402537 is about 371.8160944948.

The spelling of 51402537 in words is "fifty-one million, four hundred two thousand, five hundred thirty-seven".