2161513552 has 40 divisors (see below), whose sum is σ = 4837404672. Its totient is φ = 924710400.

The previous prime is 2161513547. The next prime is 2161513553. The reversal of 2161513552 is 2553151612.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161513553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358224 + ... + 364207.

Almost surely, 2^2161513552 is an apocalyptic number.

2161513552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2161513552 is an abundant number, since it is smaller than the sum of its proper divisors (2675891120).

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

2161513552 is a wasteful number, since it uses less digits than its factorization.

2161513552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722467 (or 722461 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 2161513552 is about 46492.0805299139. The cubic root of 2161513552 is about 1292.9626739807.

The spelling of 2161513552 in words is "two billion, one hundred sixty-one million, five hundred thirteen thousand, five hundred fifty-two".