2155514520 has 64 divisors (see below), whose sum is σ = 6502335840. Its totient is φ = 571622400.

The previous prime is 2155514509. The next prime is 2155514521. The reversal of 2155514520 is 254155512.

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 (2155514521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27901 + ... + 71340.

Almost surely, 2^2155514520 is an apocalyptic number.

2155514520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155514520 is an abundant number, since it is smaller than the sum of its proper divisors (4346821320).

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

2155514520 is a wasteful number, since it uses less digits than its factorization.

2155514520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99436 (or 99432 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 2155514520 is about 46427.5189946652. The cubic root of 2155514520 is about 1291.7654093273.

The spelling of 2155514520 in words is "two billion, one hundred fifty-five million, five hundred fourteen thousand, five hundred twenty".