51242571366 has 32 divisors (see below), whose sum is σ = 118874031360. Its totient is φ = 14422215456.

The previous prime is 51242571287. The next prime is 51242571437. The reversal of 51242571366 is 66317524215.

It is a super-2 number, since 2×51242571366² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9102121 + ... + 9107748.

It is an arithmetic number, because the mean of its divisors is an integer number (3714813480).

Almost surely, 2^51242571366 is an apocalyptic number.

51242571366 is an abundant number, since it is smaller than the sum of its proper divisors (67631459994).

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

51242571366 is a wasteful number, since it uses less digits than its factorization.

51242571366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18209948.

The product of its digits is 302400, while the sum is 42.

The spelling of 51242571366 in words is "fifty-one billion, two hundred forty-two million, five hundred seventy-one thousand, three hundred sixty-six".