122215392 has 252 divisors, whose sum is σ = 403238304. Its totient is φ = 36391680.

The previous prime is 122215381. The next prime is 122215393. The reversal of 122215392 is 293512221.

It is a happy number.

122215392 is a `hidden beast` number, since 122 + 2 + 1 + 539 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122215393) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 3942417 + ... + 3942447.

It is an arithmetic number, because the mean of its divisors is an integer number (1600152).

Almost surely, 2^122215392 is an apocalyptic number.

122215392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122215392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201619152).

122215392 is an abundant number, since it is smaller than the sum of its proper divisors (281022912).

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

122215392 is an equidigital number, since it uses as much as digits as its factorization.

122215392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 49 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 122215392 is about 11055.1070551126. The cubic root of 122215392 is about 496.2592730493.

The spelling of 122215392 in words is "one hundred twenty-two million, two hundred fifteen thousand, three hundred ninety-two".