403131000421 has 4 divisors (see below), whose sum is σ = 403175033932. Its totient is φ = 403086966912.

The previous prime is 403131000379. The next prime is 403131000427. The reversal of 403131000421 is 124000131304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 242542460196 + 160588540225 = 492486^2 + 400735^2 .

It is a cyclic number.

It is not a de Polignac number, because 403131000421 - 2²¹ = 403128903269 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 (403131000427) 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, 22003020 + ... + 22021333.

It is an arithmetic number, because the mean of its divisors is an integer number (100793758483).

Almost surely, 2^403131000421 is an apocalyptic number.

It is an amenable number.

403131000421 is a deficient number, since it is larger than the sum of its proper divisors (44033511).

403131000421 is an equidigital number, since it uses as much as digits as its factorization.

403131000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44033510.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 403131000421 its reverse (124000131304), we get a palindrome (527131131725).

The spelling of 403131000421 in words is "four hundred three billion, one hundred thirty-one million, four hundred twenty-one", and thus it is an aban number.