31401425 has 24 divisors (see below), whose sum is σ = 42988320. Its totient is φ = 22563200.

The previous prime is 31401407. The next prime is 31401439. The reversal of 31401425 is 52410413.

It is not a de Polignac number, because 31401425 - 2¹⁰ = 31400401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31401397 and 31401406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23834 + ... + 25116.

It is an arithmetic number, because the mean of its divisors is an integer number (1791180).

Almost surely, 2^31401425 is an apocalyptic number.

It is an amenable number.

31401425 is a deficient number, since it is larger than the sum of its proper divisors (11586895).

31401425 is a wasteful number, since it uses less digits than its factorization.

31401425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 31401425 is about 5603.6974400836. The cubic root of 31401425 is about 315.4881990558.

Adding to 31401425 its reverse (52410413), we get a palindrome (83811838).

The spelling of 31401425 in words is "thirty-one million, four hundred one thousand, four hundred twenty-five".