420405251313 has 4 divisors (see below), whose sum is σ = 560540335088. Its totient is φ = 280270167540.

The previous prime is 420405251311. The next prime is 420405251353. The reversal of 420405251313 is 313152504024.

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 not a de Polignac number, because 420405251313 - 2¹ = 420405251311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420405251311) 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, 70067541883 + ... + 70067541888.

It is an arithmetic number, because the mean of its divisors is an integer number (140135083772).

Almost surely, 2^420405251313 is an apocalyptic number.

It is an amenable number.

420405251313 is a deficient number, since it is larger than the sum of its proper divisors (140135083775).

420405251313 is a wasteful number, since it uses less digits than its factorization.

420405251313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140135083774.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 420405251313 its reverse (313152504024), we get a palindrome (733557755337).

The spelling of 420405251313 in words is "four hundred twenty billion, four hundred five million, two hundred fifty-one thousand, three hundred thirteen".