51547428 has 30 divisors (see below), whose sum is σ = 134756006. Its totient is φ = 17182368.

The previous prime is 51547369. The next prime is 51547459. The reversal of 51547428 is 82474515.

It can be written as a sum of positive squares in only one way, i.e., 28965924 + 22581504 = 5382^2 + 4752^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 51547392 and 51547401.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 79225 + ... + 79872.

Almost surely, 2^51547428 is an apocalyptic number.

It is an amenable number.

51547428 is an abundant number, since it is smaller than the sum of its proper divisors (83208578).

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

51547428 is a wasteful number, since it uses less digits than its factorization.

51547428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159113 (or 159102 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 51547428 is about 7179.6537520970. The cubic root of 51547428 is about 372.1651192057.

The spelling of 51547428 in words is "fifty-one million, five hundred forty-seven thousand, four hundred twenty-eight".