51132541620 has 24 divisors (see below), whose sum is σ = 143171116704. Its totient is φ = 13635344416.

The previous prime is 51132541589. The next prime is 51132541627. The reversal of 51132541620 is 2614523115.

It is a super-2 number, since 2×51132541620² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132541627) 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, 426104454 + ... + 426104573.

It is an arithmetic number, because the mean of its divisors is an integer number (5965463196).

Almost surely, 2^51132541620 is an apocalyptic number.

It is an amenable number.

51132541620 is an abundant number, since it is smaller than the sum of its proper divisors (92038575084).

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

51132541620 is a wasteful number, since it uses less digits than its factorization.

51132541620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852209039 (or 852209037 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 51132541620 in words is "fifty-one billion, one hundred thirty-two million, five hundred forty-one thousand, six hundred twenty".