51211521452 has 48 divisors (see below), whose sum is σ = 110331191040. Its totient is φ = 20254093632.

The previous prime is 51211521421. The next prime is 51211521469. The reversal of 51211521452 is 25412511215.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1519043 + ... + 1552389.

It is an arithmetic number, because the mean of its divisors is an integer number (2298566480).

Almost surely, 2^51211521452 is an apocalyptic number.

51211521452 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51211521452 is an abundant number, since it is smaller than the sum of its proper divisors (59119669588).

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

51211521452 is a wasteful number, since it uses less digits than its factorization.

51211521452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37590 (or 37588 counting only the distinct ones).

The product of its digits is 4000, while the sum is 29.

The spelling of 51211521452 in words is "fifty-one billion, two hundred eleven million, five hundred twenty-one thousand, four hundred fifty-two".