402213331 has 4 divisors (see below), whose sum is σ = 433152832. Its totient is φ = 371273832.

The previous prime is 402213323. The next prime is 402213341. The reversal of 402213331 is 133312204.

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 402213331 - 2³ = 402213323 is a prime.

It is a super-2 number, since 2×402213331² = 323551127268231122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402213299 and 402213308.

It is not an unprimeable number, because it can be changed into a prime (402213311) 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, 15469731 + ... + 15469756.

It is an arithmetic number, because the mean of its divisors is an integer number (108288208).

Almost surely, 2^402213331 is an apocalyptic number.

402213331 is a deficient number, since it is larger than the sum of its proper divisors (30939501).

402213331 is a wasteful number, since it uses less digits than its factorization.

402213331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30939500.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 402213331 is about 20055.2569417597. The cubic root of 402213331 is about 738.1627976671.

Adding to 402213331 its reverse (133312204), we get a palindrome (535525535).

The spelling of 402213331 in words is "four hundred two million, two hundred thirteen thousand, three hundred thirty-one".