402220615 has 4 divisors (see below), whose sum is σ = 482664744. Its totient is φ = 321776488.

The previous prime is 402220603. The next prime is 402220661. The reversal of 402220615 is 516022204.

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 402220615 - 2⁷ = 402220487 is a prime.

It is a super-3 number, since 3×402220615³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

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, 40222057 + ... + 40222066.

It is an arithmetic number, because the mean of its divisors is an integer number (120666186).

Almost surely, 2^402220615 is an apocalyptic number.

402220615 is a deficient number, since it is larger than the sum of its proper divisors (80444129).

402220615 is an equidigital number, since it uses as much as digits as its factorization.

402220615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80444128.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 402220615 is about 20055.4385392093. The cubic root of 402220615 is about 738.1672536320.

Adding to 402220615 its reverse (516022204), we get a palindrome (918242819).

The spelling of 402220615 in words is "four hundred two million, two hundred twenty thousand, six hundred fifteen".