51617460 has 24 divisors (see below), whose sum is σ = 144529056. Its totient is φ = 13764640.

The previous prime is 51617453. The next prime is 51617521. The reversal of 51617460 is 6471615.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430086 + ... + 430205.

It is an arithmetic number, because the mean of its divisors is an integer number (6022044).

Almost surely, 2^51617460 is an apocalyptic number.

It is an amenable number.

51617460 is an abundant number, since it is smaller than the sum of its proper divisors (92911596).

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

51617460 is a wasteful number, since it uses less digits than its factorization.

51617460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860303 (or 860301 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 51617460 is about 7184.5292121335. The cubic root of 51617460 is about 372.3335833064. Note that the first 3 decimals are identical.

It can be divided in two parts, 5161 and 7460, that added together give a palindrome (12621).

The spelling of 51617460 in words is "fifty-one million, six hundred seventeen thousand, four hundred sixty".