2125256431 has 4 divisors (see below), whose sum is σ = 2182695832. Its totient is φ = 2067817032.

The previous prime is 2125256423. The next prime is 2125256437. The reversal of 2125256431 is 1346525212.

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 2125256431 - 2³ = 2125256423 is a prime.

It is a super-2 number, since 2×2125256431² = 9033429795013715522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2125256393 and 2125256402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125256437) 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, 28719645 + ... + 28719718.

It is an arithmetic number, because the mean of its divisors is an integer number (545673958).

Almost surely, 2^2125256431 is an apocalyptic number.

2125256431 is a deficient number, since it is larger than the sum of its proper divisors (57439401).

2125256431 is an equidigital number, since it uses as much as digits as its factorization.

2125256431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57439400.

The product of its digits is 14400, while the sum is 31.

The square root of 2125256431 is about 46100.5035872711. The cubic root of 2125256431 is about 1285.6925074694.

The spelling of 2125256431 in words is "two billion, one hundred twenty-five million, two hundred fifty-six thousand, four hundred thirty-one".