51659424 has 48 divisors (see below), whose sum is σ = 150675840. Its totient is φ = 17219520.

The previous prime is 51659407. The next prime is 51659429. The reversal of 51659424 is 42495615.

It is a tau number, because it is divible by the number of its divisors (48).

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 not an unprimeable number, because it can be changed into a prime (51659429) 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, 29032 + ... + 30759.

It is an arithmetic number, because the mean of its divisors is an integer number (3139080).

Almost surely, 2^51659424 is an apocalyptic number.

51659424 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51659424 is an abundant number, since it is smaller than the sum of its proper divisors (99016416).

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

51659424 is a wasteful number, since it uses less digits than its factorization.

51659424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59810 (or 59796 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 51659424 is about 7187.4490606891. The cubic root of 51659424 is about 372.4344559842.

The spelling of 51659424 in words is "fifty-one million, six hundred fifty-nine thousand, four hundred twenty-four".