1625040431 has 4 divisors (see below), whose sum is σ = 1857189072. Its totient is φ = 1392891792.

The previous prime is 1625040377. The next prime is 1625040451. The reversal of 1625040431 is 1340405261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1340405261 = 13 ⋅103108097.

It is a cyclic number.

It is not a de Polignac number, because 1625040431 - 2²² = 1620846127 is a prime.

It is a super-2 number, since 2×1625040431² = 5281512804769331522, 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 1625040431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625040451) 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, 116074310 + ... + 116074323.

It is an arithmetic number, because the mean of its divisors is an integer number (464297268).

Almost surely, 2^1625040431 is an apocalyptic number.

1625040431 is a deficient number, since it is larger than the sum of its proper divisors (232148641).

1625040431 is an equidigital number, since it uses as much as digits as its factorization.

1625040431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232148640.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1625040431 is about 40311.7902232089. The cubic root of 1625040431 is about 1175.6770942218.

Adding to 1625040431 its reverse (1340405261), we get a palindrome (2965445692).

The spelling of 1625040431 in words is "one billion, six hundred twenty-five million, forty thousand, four hundred thirty-one".