31443125 has 20 divisors (see below), whose sum is σ = 44910624. Its totient is φ = 21558000.

The previous prime is 31443091. The next prime is 31443133. The reversal of 31443125 is 52134413.

It is not a de Polignac number, because 31443125 - 2¹⁰ = 31442101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31443125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 782 + ... + 7968.

Almost surely, 2^31443125 is an apocalyptic number.

31443125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31443125 is a deficient number, since it is larger than the sum of its proper divisors (13467499).

31443125 is an frugal number, since it uses more digits than its factorization.

31443125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7214 (or 7199 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 31443125 is about 5607.4169632728. The cubic root of 31443125 is about 315.6277897345.

Adding to 31443125 its reverse (52134413), we get a palindrome (83577538).

The spelling of 31443125 in words is "thirty-one million, four hundred forty-three thousand, one hundred twenty-five".