1215312430 has 16 divisors (see below), whose sum is σ = 2187964224. Its totient is φ = 486035680.

The previous prime is 1215312421. The next prime is 1215312443. The reversal of 1215312430 is 342135121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87675 + ... + 100585.

It is an arithmetic number, because the mean of its divisors is an integer number (136747764).

Almost surely, 2^1215312430 is an apocalyptic number.

1215312430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215312430 is a deficient number, since it is larger than the sum of its proper divisors (972651794).

1215312430 is a wasteful number, since it uses less digits than its factorization.

1215312430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22331.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1215312430 is about 34861.3314433055. The cubic root of 1215312430 is about 1067.1594468973.

Adding to 1215312430 its reverse (342135121), we get a palindrome (1557447551).

The spelling of 1215312430 in words is "one billion, two hundred fifteen million, three hundred twelve thousand, four hundred thirty".