402221131 has 8 divisors (see below), whose sum is σ = 433418720. Its totient is φ = 371060352.

The previous prime is 402221123. The next prime is 402221147. The reversal of 402221131 is 131122204.

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

It is not a de Polignac number, because 402221131 - 2³ = 402221123 is a prime.

It is a super-2 number, since 2×402221131² = 323563676445838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402221161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16090 + ... + 32608.

It is an arithmetic number, because the mean of its divisors is an integer number (54177340).

Almost surely, 2^402221131 is an apocalyptic number.

402221131 is a deficient number, since it is larger than the sum of its proper divisors (31197589).

402221131 is a wasteful number, since it uses less digits than its factorization.

402221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18405.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 402221131 is about 20055.4514035461. The cubic root of 402221131 is about 738.1675692913.

Adding to 402221131 its reverse (131122204), we get a palindrome (533343335).

The spelling of 402221131 in words is "four hundred two million, two hundred twenty-one thousand, one hundred thirty-one".