31472645 has 16 divisors (see below), whose sum is σ = 40414080. Its totient is φ = 23457600.

The previous prime is 31472633. The next prime is 31472663. The reversal of 31472645 is 54627413.

It is not a de Polignac number, because 31472645 - 2¹⁰ = 31471621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3080 + ... + 8510.

It is an arithmetic number, because the mean of its divisors is an integer number (2525880).

Almost surely, 2^31472645 is an apocalyptic number.

It is an amenable number.

31472645 is a deficient number, since it is larger than the sum of its proper divisors (8941435).

31472645 is a wasteful number, since it uses less digits than its factorization.

31472645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516.

The product of its digits is 20160, while the sum is 32.

The square root of 31472645 is about 5610.0485737648. The cubic root of 31472645 is about 315.7265332919.

The spelling of 31472645 in words is "thirty-one million, four hundred seventy-two thousand, six hundred forty-five".