1215376530 has 32 divisors (see below), whose sum is σ = 2988050688. Its totient is φ = 316195200.

The previous prime is 1215376523. The next prime is 1215376541. The reversal of 1215376530 is 356735121.

It is a junction number, because it is equal to n+sod(n) for n = 1215376491 and 1215376500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492826 + ... + 495285.

It is an arithmetic number, because the mean of its divisors is an integer number (93376584).

Almost surely, 2^1215376530 is an apocalyptic number.

1215376530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215376530 is an abundant number, since it is smaller than the sum of its proper divisors (1772674158).

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

1215376530 is a wasteful number, since it uses less digits than its factorization.

1215376530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988162.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 1215376530 is about 34862.2507879225. The cubic root of 1215376530 is about 1067.1782085250.

The spelling of 1215376530 in words is "one billion, two hundred fifteen million, three hundred seventy-six thousand, five hundred thirty".