51513028 has 48 divisors (see below), whose sum is σ = 111422080. Its totient is φ = 20342016.

The previous prime is 51513023. The next prime is 51513029. The reversal of 51513028 is 82031515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51512993 and 51513011.

It is not an unprimeable number, because it can be changed into a prime (51513023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18376 + ... + 20992.

Almost surely, 2^51513028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51513028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55711040).

51513028 is an abundant number, since it is smaller than the sum of its proper divisors (59909052).

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

51513028 is a wasteful number, since it uses less digits than its factorization.

51513028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 51513028 is about 7177.2576935763. The cubic root of 51513028 is about 372.0823130758.

The spelling of 51513028 in words is "fifty-one million, five hundred thirteen thousand, twenty-eight".