2151224531 has 8 divisors (see below), whose sum is σ = 2204327328. Its totient is φ = 2098152000.

The previous prime is 2151224507. The next prime is 2151224533. The reversal of 2151224531 is 1354221512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2151224531 - 2²² = 2147030227 is a prime.

It is a super-2 number, since 2×2151224531² = 9255533965552339922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2151224531.

It is not an unprimeable number, because it can be changed into a prime (2151224533) 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, 217841 + ... + 227501.

It is an arithmetic number, because the mean of its divisors is an integer number (275540916).

Almost surely, 2^2151224531 is an apocalyptic number.

2151224531 is a deficient number, since it is larger than the sum of its proper divisors (53102797).

2151224531 is an equidigital number, since it uses as much as digits as its factorization.

2151224531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15133.

The product of its digits is 2400, while the sum is 26.

The square root of 2151224531 is about 46381.2950552267. The cubic root of 2151224531 is about 1290.9078662172.

The spelling of 2151224531 in words is "two billion, one hundred fifty-one million, two hundred twenty-four thousand, five hundred thirty-one".