51511896 has 32 divisors (see below), whose sum is σ = 143089200. Its totient is φ = 17170560.

The previous prime is 51511891. The next prime is 51511913. The reversal of 51511896 is 69811515.

51511896 is a `hidden beast` number, since 51 + 511 + 8 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51511896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51511891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119025 + ... + 119456.

Almost surely, 2^51511896 is an apocalyptic number.

It is an amenable number.

51511896 is an abundant number, since it is smaller than the sum of its proper divisors (91577304).

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

51511896 is a wasteful number, since it uses less digits than its factorization.

51511896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238496 (or 238486 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The square root of 51511896 is about 7177.1788329399. The cubic root of 51511896 is about 372.0795875500.

The spelling of 51511896 in words is "fifty-one million, five hundred eleven thousand, eight hundred ninety-six".