51423402 has 16 divisors (see below), whose sum is σ = 108896832. Its totient is φ = 16132800.

The previous prime is 51423373. The next prime is 51423413. The reversal of 51423402 is 20432415.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251974 + ... + 252177.

It is an arithmetic number, because the mean of its divisors is an integer number (6806052).

Almost surely, 2^51423402 is an apocalyptic number.

51423402 is an abundant number, since it is smaller than the sum of its proper divisors (57473430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51423402 is a wasteful number, since it uses less digits than its factorization.

51423402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504173.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 51423402 is about 7171.0112257617. The cubic root of 51423402 is about 371.8663961195.

Adding to 51423402 its reverse (20432415), we get a palindrome (71855817).

The spelling of 51423402 in words is "fifty-one million, four hundred twenty-three thousand, four hundred two".