31421953 has 8 divisors (see below), whose sum is σ = 33127200. Its totient is φ = 29721888.

The previous prime is 31421947. The next prime is 31421963. The reversal of 31421953 is 35912413.

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

It is a cyclic number.

It is not a de Polignac number, because 31421953 - 2⁹ = 31421441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31421963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23733 + ... + 25021.

It is an arithmetic number, because the mean of its divisors is an integer number (4140900).

Almost surely, 2^31421953 is an apocalyptic number.

It is an amenable number.

31421953 is a deficient number, since it is larger than the sum of its proper divisors (1705247).

31421953 is a wasteful number, since it uses less digits than its factorization.

31421953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591.

The product of its digits is 3240, while the sum is 28.

The square root of 31421953 is about 5605.5287886158. The cubic root of 31421953 is about 315.5569319345.

The spelling of 31421953 in words is "thirty-one million, four hundred twenty-one thousand, nine hundred fifty-three".