31980453 has 4 divisors (see below), whose sum is σ = 42640608. Its totient is φ = 21320300.

The previous prime is 31980427. The next prime is 31980457. The reversal of 31980453 is 35408913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31980453 - 2¹⁰ = 31979429 is a prime.

It is a super-3 number, since 3×31980453³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31980457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330073 + ... + 5330078.

It is an arithmetic number, because the mean of its divisors is an integer number (10660152).

Almost surely, 2^31980453 is an apocalyptic number.

It is an amenable number.

31980453 is a deficient number, since it is larger than the sum of its proper divisors (10660155).

31980453 is a wasteful number, since it uses less digits than its factorization.

31980453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660154.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 31980453 is about 5655.1262585375. The cubic root of 31980453 is about 317.4155536260.

The spelling of 31980453 in words is "thirty-one million, nine hundred eighty thousand, four hundred fifty-three".