1025315431 has 4 divisors (see below), whose sum is σ = 1171789072. Its totient is φ = 878841792.

The previous prime is 1025315377. The next prime is 1025315443. The reversal of 1025315431 is 1345135201.

It is a happy number.

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 1025315431 - 2¹¹ = 1025313383 is a prime.

It is a super-2 number, since 2×1025315431² = 2102543466093431522, 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 = 1025315396 and 1025315405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025315471) 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, 73236810 + ... + 73236823.

It is an arithmetic number, because the mean of its divisors is an integer number (292947268).

Almost surely, 2^1025315431 is an apocalyptic number.

1025315431 is a deficient number, since it is larger than the sum of its proper divisors (146473641).

1025315431 is an equidigital number, since it uses as much as digits as its factorization.

1025315431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146473640.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1025315431 is about 32020.5470128166. The cubic root of 1025315431 is about 1008.3682539887.

The spelling of 1025315431 in words is "one billion, twenty-five million, three hundred fifteen thousand, four hundred thirty-one".