1215022032 has 450 divisors, whose sum is σ = 4398865218. Its totient is φ = 322672896.

The previous prime is 1215022031. The next prime is 1215022063. The reversal of 1215022032 is 2302205121.

It can be written as a sum of positive squares in only one way, i.e., 1123322256 + 91699776 = 33516^2 + 9576^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1215021996 and 1215022014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215022031) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 22924918 + ... + 22924970.

Almost surely, 2^1215022032 is an apocalyptic number.

1215022032 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 1215022032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2199432609).

1215022032 is an abundant number, since it is smaller than the sum of its proper divisors (3183843186).

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

1215022032 is a wasteful number, since it uses less digits than its factorization.

1215022032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1215022032 is about 34857.1661498751. The cubic root of 1215022032 is about 1067.0744411412.

Adding to 1215022032 its reverse (2302205121), we get a palindrome (3517227153).

The spelling of 1215022032 in words is "one billion, two hundred fifteen million, twenty-two thousand, thirty-two".