402220225 has 12 divisors (see below), whose sum is σ = 544094640. Its totient is φ = 292523600.

The previous prime is 402220213. The next prime is 402220261. The reversal of 402220225 is 522022204.

It is not a de Polignac number, because 402220225 - 2²³ = 393831617 is a prime.

It is a super-2 number, since 2×402220225² = 323562218798101250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 731035 + ... + 731584.

It is an arithmetic number, because the mean of its divisors is an integer number (45341220).

Almost surely, 2^402220225 is an apocalyptic number.

It is an amenable number.

402220225 is a deficient number, since it is larger than the sum of its proper divisors (141874415).

402220225 is a wasteful number, since it uses less digits than its factorization.

402220225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462640 (or 1462635 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 402220225 is about 20055.4288161585. The cubic root of 402220225 is about 738.1670150520.

Adding to 402220225 its reverse (522022204), we get a palindrome (924242429).

The spelling of 402220225 in words is "four hundred two million, two hundred twenty thousand, two hundred twenty-five".