402444244031 has 4 divisors (see below), whose sum is σ = 406005697632. Its totient is φ = 398882790432.

The previous prime is 402444243959. The next prime is 402444244049. The reversal of 402444244031 is 130442444204.

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

It is a cyclic number.

It is not a de Polignac number, because 402444244031 - 2²² = 402440049727 is a prime.

It is a super-2 number, since 2×402444244031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402444244061) 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, 1780726631 + ... + 1780726856.

It is an arithmetic number, because the mean of its divisors is an integer number (101501424408).

Almost surely, 2^402444244031 is an apocalyptic number.

402444244031 is a deficient number, since it is larger than the sum of its proper divisors (3561453601).

402444244031 is a wasteful number, since it uses less digits than its factorization.

402444244031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561453600.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 402444244031 its reverse (130442444204), we get a palindrome (532886688235).

The spelling of 402444244031 in words is "four hundred two billion, four hundred forty-four million, two hundred forty-four thousand, thirty-one".