101515980 has 24 divisors (see below), whose sum is σ = 284244912. Its totient is φ = 27070912.

The previous prime is 101515943. The next prime is 101515987. The reversal of 101515980 is 89515101.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (101515987) 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, 845907 + ... + 846026.

It is an arithmetic number, because the mean of its divisors is an integer number (11843538).

Almost surely, 2^101515980 is an apocalyptic number.

101515980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101515980 is an abundant number, since it is smaller than the sum of its proper divisors (182728932).

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

101515980 is a wasteful number, since it uses less digits than its factorization.

101515980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691945 (or 1691943 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 30.

The square root of 101515980 is about 10075.5138826762. The cubic root of 101515980 is about 466.4926482691.

The spelling of 101515980 in words is "one hundred one million, five hundred fifteen thousand, nine hundred eighty".