2155000540 has 48 divisors (see below), whose sum is σ = 5642187264. Its totient is φ = 671688000.

The previous prime is 2155000531. The next prime is 2155000543. The reversal of 2155000540 is 450005512.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155000543) 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, 698136 + ... + 701215.

It is an arithmetic number, because the mean of its divisors is an integer number (117545568).

Almost surely, 2^2155000540 is an apocalyptic number.

2155000540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155000540 is an abundant number, since it is smaller than the sum of its proper divisors (3487186724).

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

2155000540 is a wasteful number, since it uses less digits than its factorization.

2155000540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399378 (or 1399376 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 2155000540 is about 46421.9833699509. The cubic root of 2155000540 is about 1291.6627278317.

The spelling of 2155000540 in words is "two billion, one hundred fifty-five million, five hundred forty", and thus it is an aban number.