99920515 has 8 divisors (see below), whose sum is σ = 124039440. Its totient is φ = 77179872.

The previous prime is 99920503. The next prime is 99920549. The reversal of 99920515 is 51502999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99920515 - 2¹⁵ = 99887747 is a prime.

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, 344409 + ... + 344698.

It is an arithmetic number, because the mean of its divisors is an integer number (15504930).

Almost surely, 2^99920515 is an apocalyptic number.

99920515 is a deficient number, since it is larger than the sum of its proper divisors (24118925).

99920515 is a wasteful number, since it uses less digits than its factorization.

99920515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689141.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 99920515 is about 9996.0249599528. The cubic root of 99920515 is about 464.0358718675.

The spelling of 99920515 in words is "ninety-nine million, nine hundred twenty thousand, five hundred fifteen".