51051972 has 24 divisors (see below), whose sum is σ = 120558816. Its totient is φ = 16811968.

The previous prime is 51051953. The next prime is 51051983. The reversal of 51051972 is 27915015.

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, 24633 + ... + 26624.

It is an arithmetic number, because the mean of its divisors is an integer number (5023284).

Almost surely, 2^51051972 is an apocalyptic number.

It is an amenable number.

51051972 is an abundant number, since it is smaller than the sum of its proper divisors (69506844).

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

51051972 is a wasteful number, since it uses less digits than its factorization.

51051972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51347 (or 51345 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 51051972 is about 7145.0662698116. The cubic root of 51051972 is about 370.9689044297.

Adding to 51051972 its reverse (27915015), we get a palindrome (78966987).

The spelling of 51051972 in words is "fifty-one million, fifty-one thousand, nine hundred seventy-two".