22131331402 has 8 divisors (see below), whose sum is σ = 33217788996. Its totient is φ = 11058735072.

The previous prime is 22131331399. The next prime is 22131331433. The reversal of 22131331402 is 20413313122.

It can be written as a sum of positive squares in 2 ways, for example, as 20987606641 + 1143724761 = 144871^2 + 33819^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3461323 + ... + 3467710.

Almost surely, 2^22131331402 is an apocalyptic number.

22131331402 is a deficient number, since it is larger than the sum of its proper divisors (11086457594).

22131331402 is a wasteful number, since it uses less digits than its factorization.

22131331402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930632.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 22131331402 its reverse (20413313122), we get a palindrome (42544644524).

The spelling of 22131331402 in words is "twenty-two billion, one hundred thirty-one million, three hundred thirty-one thousand, four hundred two".