2151013531 has 4 divisors (see below), whose sum is σ = 2151840600. Its totient is φ = 2150186464.

The previous prime is 2151013489. The next prime is 2151013561. The reversal of 2151013531 is 1353101512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2151013531 - 2²⁹ = 1614142619 is a prime.

It is a super-2 number, since 2×2151013531² = 9253718421090175922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151013561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409621 + ... + 414838.

It is an arithmetic number, because the mean of its divisors is an integer number (537960150).

Almost surely, 2^2151013531 is an apocalyptic number.

2151013531 is a deficient number, since it is larger than the sum of its proper divisors (827069).

2151013531 is an equidigital number, since it uses as much as digits as its factorization.

2151013531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827068.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 2151013531 is about 46379.0203755966. The cubic root of 2151013531 is about 1290.8656591763.

The spelling of 2151013531 in words is "two billion, one hundred fifty-one million, thirteen thousand, five hundred thirty-one".