1215009016 has 32 divisors (see below), whose sum is σ = 2460734640. Its totient is φ = 559093248.

The previous prime is 1215009011. The next prime is 1215009031. The reversal of 1215009016 is 6109005121.

It is a super-2 number, since 2×1215009016² = 2952493817922576512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215009011) 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, 17715 + ... + 52381.

Almost surely, 2^1215009016 is an apocalyptic number.

It is an amenable number.

1215009016 is an abundant number, since it is smaller than the sum of its proper divisors (1245725624).

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

1215009016 is a wasteful number, since it uses less digits than its factorization.

1215009016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35023 (or 35019 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1215009016 is about 34856.9794445818. The cubic root of 1215009016 is about 1067.0706307602.

The spelling of 1215009016 in words is "one billion, two hundred fifteen million, nine thousand, sixteen".