2150786520 has 80 divisors (see below), whose sum is σ = 7229043360. Its totient is φ = 573542208.

The previous prime is 2150786507. The next prime is 2150786527. The reversal of 2150786520 is 256870512.

It is a happy number.

2150786520 is a `hidden beast` number, since 2 + 1 + 50 + 7 + 86 + 520 = 666.

It is a super-2 number, since 2×2150786520² = 9251765309227420800, which contains 22 as substring.

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 (2150786527) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 328672 + ... + 335151.

It is an arithmetic number, because the mean of its divisors is an integer number (90363042).

Almost surely, 2^2150786520 is an apocalyptic number.

2150786520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2150786520 is an abundant number, since it is smaller than the sum of its proper divisors (5078256840).

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

2150786520 is a wasteful number, since it uses less digits than its factorization.

2150786520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663846 (or 663833 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 2150786520 is about 46376.5729652375. The cubic root of 2150786520 is about 1290.8202463186.

The spelling of 2150786520 in words is "two billion, one hundred fifty million, seven hundred eighty-six thousand, five hundred twenty".