402223031 has 4 divisors (see below), whose sum is σ = 459683472. Its totient is φ = 344762592.

The previous prime is 402223021. The next prime is 402223051. The reversal of 402223031 is 130322204.

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 402223031 - 2¹⁸ = 401960887 is a prime.

It is a super-2 number, since 2×402223031² = 323566733333653922, which 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 (402223021) 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, 28730210 + ... + 28730223.

It is an arithmetic number, because the mean of its divisors is an integer number (114920868).

Almost surely, 2^402223031 is an apocalyptic number.

402223031 is a deficient number, since it is larger than the sum of its proper divisors (57460441).

402223031 is an equidigital number, since it uses as much as digits as its factorization.

402223031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57460440.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 402223031 is about 20055.4987721572. The cubic root of 402223031 is about 738.1687316007.

Adding to 402223031 its reverse (130322204), we get a palindrome (532545235).

The spelling of 402223031 in words is "four hundred two million, two hundred twenty-three thousand, thirty-one".