1215402222 has 16 divisors (see below), whose sum is σ = 2558741760. Its totient is φ = 383811192.

The previous prime is 1215402197. The next prime is 1215402229. The reversal of 1215402222 is 2222045121.

It is a super-2 number, since 2×1215402222² = 2954405122485074568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215402229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5330598 + ... + 5330825.

It is an arithmetic number, because the mean of its divisors is an integer number (159921360).

Almost surely, 2^1215402222 is an apocalyptic number.

1215402222 is an abundant number, since it is smaller than the sum of its proper divisors (1343339538).

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

1215402222 is a wasteful number, since it uses less digits than its factorization.

1215402222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661447.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1215402222 is about 34862.6192647655. The cubic root of 1215402222 is about 1067.1857282109.

Adding to 1215402222 its reverse (2222045121), we get a palindrome (3437447343).

The spelling of 1215402222 in words is "one billion, two hundred fifteen million, four hundred two thousand, two hundred twenty-two".