31425145 has 8 divisors (see below), whose sum is σ = 39695040. Its totient is φ = 23816880.

The previous prime is 31425133. The next prime is 31425179. The reversal of 31425145 is 54152413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31425145 - 2²¹ = 29327993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165301 + ... + 165490.

It is an arithmetic number, because the mean of its divisors is an integer number (4961880).

Almost surely, 2^31425145 is an apocalyptic number.

It is an amenable number.

31425145 is a deficient number, since it is larger than the sum of its proper divisors (8269895).

31425145 is a wasteful number, since it uses less digits than its factorization.

31425145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330815.

The product of its digits is 2400, while the sum is 25.

The square root of 31425145 is about 5605.8135002870. The cubic root of 31425145 is about 315.5676168594.

Adding to 31425145 its reverse (54152413), we get a palindrome (85577558).

The spelling of 31425145 in words is "thirty-one million, four hundred twenty-five thousand, one hundred forty-five".