2531431690 has 8 divisors (see below), whose sum is σ = 4556577060. Its totient is φ = 1012572672.

The previous prime is 2531431667. The next prime is 2531431711. The reversal of 2531431690 is 961341352.

It can be written as a sum of positive squares in 2 ways, for example, as 2264141889 + 267289801 = 47583^2 + 16349^2 .

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

It is a super-2 number, since 2×2531431690² = 12816292802272512200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126571575 + ... + 126571594.

Almost surely, 2^2531431690 is an apocalyptic number.

2531431690 is a deficient number, since it is larger than the sum of its proper divisors (2025145370).

2531431690 is a wasteful number, since it uses less digits than its factorization.

2531431690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253143176.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 2531431690 is about 50313.3351110816. The cubic root of 2531431690 is about 1362.8730515122.

The spelling of 2531431690 in words is "two billion, five hundred thirty-one million, four hundred thirty-one thousand, six hundred ninety".