51148816 has 20 divisors (see below), whose sum is σ = 100972332. Its totient is φ = 25091456.

The previous prime is 51148807. The next prime is 51148829. The reversal of 51148816 is 61884115.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13987600 + 37161216 = 3740^2 + 6096^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29311 + ... + 31006.

Almost surely, 2^51148816 is an apocalyptic number.

It is an amenable number.

51148816 is a deficient number, since it is larger than the sum of its proper divisors (49823516).

51148816 is a wasteful number, since it uses less digits than its factorization.

51148816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60378 (or 60372 counting only the distinct ones).

The product of its digits is 7680, while the sum is 34.

The square root of 51148816 is about 7151.8400429540. The cubic root of 51148816 is about 371.2033284110.

The spelling of 51148816 in words is "fifty-one million, one hundred forty-eight thousand, eight hundred sixteen".