31319425 has 6 divisors (see below), whose sum is σ = 38836118. Its totient is φ = 25055520.

The previous prime is 31319411. The next prime is 31319441. The reversal of 31319425 is 52491313.

It can be written as a sum of positive squares in 3 ways, for example, as 2835856 + 28483569 = 1684^2 + 5337^2 .

It is not a de Polignac number, because 31319425 - 2²¹ = 29222273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31319393 and 31319402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 626364 + ... + 626413.

Almost surely, 2^31319425 is an apocalyptic number.

It is an amenable number.

31319425 is a deficient number, since it is larger than the sum of its proper divisors (7516693).

31319425 is a wasteful number, since it uses less digits than its factorization.

31319425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252787 (or 1252782 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 31319425 is about 5596.3760595585. The cubic root of 31319425 is about 315.2133433384.

The spelling of 31319425 in words is "thirty-one million, three hundred nineteen thousand, four hundred twenty-five".