31420453 has 4 divisors (see below), whose sum is σ = 32434048. Its totient is φ = 30406860.

The previous prime is 31420447. The next prime is 31420457. The reversal of 31420453 is 35402413.

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 31420453 - 2¹³ = 31412261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420457) 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, 506751 + ... + 506812.

It is an arithmetic number, because the mean of its divisors is an integer number (8108512).

Almost surely, 2^31420453 is an apocalyptic number.

It is an amenable number.

31420453 is a deficient number, since it is larger than the sum of its proper divisors (1013595).

31420453 is a wasteful number, since it uses less digits than its factorization.

31420453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013594.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 31420453 is about 5605.3949905426. The cubic root of 31420453 is about 315.5519105733.

Adding to 31420453 its reverse (35402413), we get a palindrome (66822866).

The spelling of 31420453 in words is "thirty-one million, four hundred twenty thousand, four hundred fifty-three".