2531874809 has 4 divisors (see below), whose sum is σ = 2547035904. Its totient is φ = 2516713716.

The previous prime is 2531874803. The next prime is 2531874817. The reversal of 2531874809 is 9084781352.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2531874809 - 2¹² = 2531870713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2531874803) 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, 7580297 + ... + 7580630.

It is an arithmetic number, because the mean of its divisors is an integer number (636758976).

Almost surely, 2^2531874809 is an apocalyptic number.

It is an amenable number.

2531874809 is a deficient number, since it is larger than the sum of its proper divisors (15161095).

2531874809 is a wasteful number, since it uses less digits than its factorization.

2531874809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15161094.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 2531874809 is about 50317.7385123775. The cubic root of 2531874809 is about 1362.9525690584.

The spelling of 2531874809 in words is "two billion, five hundred thirty-one million, eight hundred seventy-four thousand, eight hundred nine".