31401025 has 6 divisors (see below), whose sum is σ = 38937302. Its totient is φ = 25120800.

The previous prime is 31401017. The next prime is 31401037. The reversal of 31401025 is 52010413.

It can be written as a sum of positive squares in 3 ways, for example, as 1062961 + 30338064 = 1031^2 + 5508^2 .

It is not a de Polignac number, because 31401025 - 2³ = 31401017 is a prime.

It is a Duffinian number.

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, 627996 + ... + 628045.

Almost surely, 2^31401025 is an apocalyptic number.

It is an amenable number.

31401025 is a deficient number, since it is larger than the sum of its proper divisors (7536277).

31401025 is a wasteful number, since it uses less digits than its factorization.

31401025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256051 (or 1256046 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 31401025 is about 5603.6617492493. The cubic root of 31401025 is about 315.4868594582.

Adding to 31401025 its reverse (52010413), we get a palindrome (83411438).

The spelling of 31401025 in words is "thirty-one million, four hundred one thousand, twenty-five".