402642501431 has 8 divisors (see below), whose sum is σ = 406806341760. Its totient is φ = 398478924288.

The previous prime is 402642501413. The next prime is 402642501473. The reversal of 402642501431 is 134105246204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402642501431 - 2²⁶ = 402575392567 is a prime.

It is a super-2 number, since 2×402642501431² (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 (402642501931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5066555 + ... + 5145411.

It is an arithmetic number, because the mean of its divisors is an integer number (50850792720).

Almost surely, 2^402642501431 is an apocalyptic number.

402642501431 is a deficient number, since it is larger than the sum of its proper divisors (4163840329).

402642501431 is an equidigital number, since it uses as much as digits as its factorization.

402642501431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131593.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 402642501431 its reverse (134105246204), we get a palindrome (536747747635).

The spelling of 402642501431 in words is "four hundred two billion, six hundred forty-two million, five hundred one thousand, four hundred thirty-one".