222309786402 has 54 divisors (see below), whose sum is σ = 529492658331. Its totient is φ = 67359933960.

The previous prime is 222309786383. The next prime is 222309786421. The reversal of 222309786402 is 204687903222.

222309786402 is a `hidden beast` number, since 2 + 2 + 230 + 9 + 7 + 8 + 6 + 402 = 666.

It is an interprime number because it is at equal distance from previous prime (222309786383) and next prime (222309786421).

It can be written as a sum of positive squares in only one way, i.e., 111154893201 + 111154893201 = 333399^2 + 333399^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333399.

It is a super-2 number, since 2×222309786402² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21999283 + ... + 22009385.

Almost surely, 2^222309786402 is an apocalyptic number.

222309786402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

222309786402 is an abundant number, since it is smaller than the sum of its proper divisors (307182871929).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222309786402 is an equidigital number, since it uses as much as digits as its factorization.

222309786402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20236 (or 10119 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 222309786402 in words is "two hundred twenty-two billion, three hundred nine million, seven hundred eighty-six thousand, four hundred two".