51400772 has 6 divisors (see below), whose sum is σ = 89951358. Its totient is φ = 25700384.

The previous prime is 51400753. The next prime is 51400799. The reversal of 51400772 is 27700415.

It can be written as a sum of positive squares in only one way, i.e., 26460736 + 24940036 = 5144^2 + 4994^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6425093 + ... + 6425100.

It is an arithmetic number, because the mean of its divisors is an integer number (14991893).

Almost surely, 2^51400772 is an apocalyptic number.

It is an amenable number.

51400772 is a deficient number, since it is larger than the sum of its proper divisors (38550586).

51400772 is a wasteful number, since it uses less digits than its factorization.

51400772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12850197 (or 12850195 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 51400772 is about 7169.4331714578. The cubic root of 51400772 is about 371.8118387845.

The spelling of 51400772 in words is "fifty-one million, four hundred thousand, seven hundred seventy-two".