2157375531 has 8 divisors (see below), whose sum is σ = 3045706704. Its totient is φ = 1353647360.

The previous prime is 2157375503. The next prime is 2157375557. The reversal of 2157375531 is 1355737512.

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 2157375531 - 2⁵ = 2157375499 is a prime.

It is a super-2 number, since 2×2157375531² = 9308538363515063922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2157375531.

It is not an unprimeable number, because it can be changed into a prime (2157375131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21150690 + ... + 21150791.

It is an arithmetic number, because the mean of its divisors is an integer number (380713338).

Almost surely, 2^2157375531 is an apocalyptic number.

2157375531 is a deficient number, since it is larger than the sum of its proper divisors (888331173).

2157375531 is a wasteful number, since it uses less digits than its factorization.

2157375531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42301501.

The product of its digits is 110250, while the sum is 39.

The square root of 2157375531 is about 46447.5567818158. The cubic root of 2157375531 is about 1292.1370604419.

The spelling of 2157375531 in words is "two billion, one hundred fifty-seven million, three hundred seventy-five thousand, five hundred thirty-one".