51125456 has 20 divisors (see below), whose sum is σ = 99984672. Its totient is φ = 25322976.

The previous prime is 51125419. The next prime is 51125461. The reversal of 51125456 is 65452115.

It is a happy number.

It is a super-2 number, since 2×51125456² = 5227624502415872, which contains 22 as substring.

It is a congruent number.

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, 13220 + ... + 16643.

Almost surely, 2^51125456 is an apocalyptic number.

It is an amenable number.

51125456 is a deficient number, since it is larger than the sum of its proper divisors (48859216).

51125456 is a wasteful number, since it uses less digits than its factorization.

51125456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29978 (or 29972 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 51125456 is about 7150.2067102987. The cubic root of 51125456 is about 371.1468094737.

The spelling of 51125456 in words is "fifty-one million, one hundred twenty-five thousand, four hundred fifty-six".