5151536231220 has 144 divisors (see below), whose sum is σ = 16467176299392. Its totient is φ = 1301004883200.

The previous prime is 5151536231213. The next prime is 5151536231227. The reversal of 5151536231220 is 221326351515.

5151536231220 is a `hidden beast` number, since 5 + 1 + 5 + 1 + 5 + 3 + 623 + 1 + 2 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (5151536231213) and next prime (5151536231227).

It is a super-2 number, since 2×5151536231220² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5151536231227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5741922 + ... + 6578201.

It is an arithmetic number, because the mean of its divisors is an integer number (114355390968).

Almost surely, 2^{5151536231220} is an apocalyptic number.

It is an amenable number.

5151536231220 is an abundant number, since it is smaller than the sum of its proper divisors (11315640068172).

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

5151536231220 is a wasteful number, since it uses less digits than its factorization.

5151536231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12320262 (or 12320257 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 5151536231220 in words is "five trillion, one hundred fifty-one billion, five hundred thirty-six million, two hundred thirty-one thousand, two hundred twenty".