51213954 has 32 divisors (see below), whose sum is σ = 112002624. Its totient is φ = 15482880.

The previous prime is 51213937. The next prime is 51213959. The reversal of 51213954 is 45931215.

It is not an unprimeable number, because it can be changed into a prime (51213959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43842 + ... + 44994.

It is an arithmetic number, because the mean of its divisors is an integer number (3500082).

Almost surely, 2^51213954 is an apocalyptic number.

51213954 is an abundant number, since it is smaller than the sum of its proper divisors (60788670).

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

51213954 is a wasteful number, since it uses less digits than its factorization.

51213954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842.

The product of its digits is 5400, while the sum is 30.

The square root of 51213954 is about 7156.3925269650. The cubic root of 51213954 is about 371.3608373387.

The spelling of 51213954 in words is "fifty-one million, two hundred thirteen thousand, nine hundred fifty-four".