51098658 has 16 divisors (see below), whose sum is σ = 110058816. Its totient is φ = 15722640.

The previous prime is 51098639. The next prime is 51098683. The reversal of 51098658 is 85689015.

51098658 = 602² + 603² + ... + 718².

It is a super-2 number, since 2×51098658² = 5222145698801928, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327478 + ... + 327633.

It is an arithmetic number, because the mean of its divisors is an integer number (6878676).

Almost surely, 2^51098658 is an apocalyptic number.

51098658 is an abundant number, since it is smaller than the sum of its proper divisors (58960158).

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

51098658 is a wasteful number, since it uses less digits than its factorization.

51098658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655129.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 51098658 is about 7148.3325328359. The cubic root of 51098658 is about 371.0819511738.

The spelling of 51098658 in words is "fifty-one million, ninety-eight thousand, six hundred fifty-eight".