51375748 has 6 divisors (see below), whose sum is σ = 89907566. Its totient is φ = 25687872.

The previous prime is 51375707. The next prime is 51375749. The reversal of 51375748 is 84757315.

It can be written as a sum of positive squares in only one way, i.e., 50722884 + 652864 = 7122^2 + 808^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51375748.

It is not an unprimeable number, because it can be changed into a prime (51375749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6421965 + ... + 6421972.

Almost surely, 2^51375748 is an apocalyptic number.

It is an amenable number.

51375748 is a deficient number, since it is larger than the sum of its proper divisors (38531818).

51375748 is a wasteful number, since it uses less digits than its factorization.

51375748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12843941 (or 12843939 counting only the distinct ones).

The product of its digits is 117600, while the sum is 40.

The square root of 51375748 is about 7167.6877722178. The cubic root of 51375748 is about 371.7514912489.

The spelling of 51375748 in words is "fifty-one million, three hundred seventy-five thousand, seven hundred forty-eight".