51402038 has 4 divisors (see below), whose sum is σ = 77103060. Its totient is φ = 25701018.

The previous prime is 51402037. The next prime is 51402041. The reversal of 51402038 is 83020415.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 12850508 + ... + 12850511.

It is an arithmetic number, because the mean of its divisors is an integer number (19275765).

Almost surely, 2^51402038 is an apocalyptic number.

51402038 is a deficient number, since it is larger than the sum of its proper divisors (25701022).

51402038 is a wasteful number, since it uses less digits than its factorization.

51402038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25701021.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 51402038 is about 7169.5214624130. The cubic root of 51402038 is about 371.8148913322.

The spelling of 51402038 in words is "fifty-one million, four hundred two thousand, thirty-eight".