2153529835081 has 9 divisors (see below), whose sum is σ = 2287686222471. Its totient is φ = 2026828129632.

The previous prime is 2153529835033. The next prime is 2153529835087. The reversal of 2153529835081 is 1805389253512.

The square root of 2153529835081 is 1467491.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1676623574025 + 476906261056 = 1294845^2 + 690584^2 .

It is not a de Polignac number, because 2153529835081 - 2⁹ = 2153529834569 is a prime.

It is a super-2 number, since 2×2153529835081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153529835087) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24904186 + ... + 24990508.

Almost surely, 2^{2153529835081} is an apocalyptic number.

2153529835081 is the 1467491-st square number.

2153529835081 is the 733746-th centered octagonal number.

It is an amenable number.

2153529835081 is a deficient number, since it is larger than the sum of its proper divisors (134156387390).

2153529835081 is an frugal number, since it uses more digits than its factorization.

2153529835081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172680 (or 86340 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 2153529835081 in words is "two trillion, one hundred fifty-three billion, five hundred twenty-nine million, eight hundred thirty-five thousand, eighty-one".