455131621 has 4 divisors (see below), whose sum is σ = 520150432. Its totient is φ = 390112812.

The previous prime is 455131619. The next prime is 455131657. The reversal of 455131621 is 126131554.

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 455131621 - 2¹ = 455131619 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 455131621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (455111621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32509395 + ... + 32509408.

It is an arithmetic number, because the mean of its divisors is an integer number (130037608).

Almost surely, 2^455131621 is an apocalyptic number.

It is an amenable number.

455131621 is a deficient number, since it is larger than the sum of its proper divisors (65018811).

455131621 is an equidigital number, since it uses as much as digits as its factorization.

455131621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65018810.

The product of its digits is 3600, while the sum is 28.

The square root of 455131621 is about 21333.8140284385. The cubic root of 455131621 is about 769.2113254924.

The spelling of 455131621 in words is "four hundred fifty-five million, one hundred thirty-one thousand, six hundred twenty-one".