51179730 has 128 divisors (see below), whose sum is σ = 150405120. Its totient is φ = 10886400.

The previous prime is 51179719. The next prime is 51179743. The reversal of 51179730 is 3797115.

51179730 = 28² + 29² + ... + 535².

It is a junction number, because it is equal to n+sod(n) for n = 51179691 and 51179700.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 402927 + ... + 403053.

It is an arithmetic number, because the mean of its divisors is an integer number (1175040).

Almost surely, 2^51179730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51179730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75202560).

51179730 is an abundant number, since it is smaller than the sum of its proper divisors (99225390).

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

51179730 is a wasteful number, since it uses less digits than its factorization.

51179730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 6615, while the sum is 33.

The square root of 51179730 is about 7154.0009784735. Note that the first 3 decimals coincide. The cubic root of 51179730 is about 371.2780976138.

The spelling of 51179730 in words is "fifty-one million, one hundred seventy-nine thousand, seven hundred thirty".