2161542510 has 40 divisors (see below), whose sum is σ = 5812149816. Its totient is φ = 576411120.

The previous prime is 2161542497. The next prime is 2161542517. The reversal of 2161542510 is 152451612.

2161542510 is a `hidden beast` number, since 2 + 1 + 615 + 42 + 5 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161542517) 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, 1333476 + ... + 1335095.

Almost surely, 2^2161542510 is an apocalyptic number.

2161542510 is an abundant number, since it is smaller than the sum of its proper divisors (3650607306).

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

2161542510 is a wasteful number, since it uses less digits than its factorization.

2161542510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668590 (or 2668581 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2161542510 is about 46492.3919582548. The cubic root of 2161542510 is about 1292.9684479357.

The spelling of 2161542510 in words is "two billion, one hundred sixty-one million, five hundred forty-two thousand, five hundred ten".