99745515 has 24 divisors (see below), whose sum is σ = 176574528. Its totient is φ = 52064640.

The previous prime is 99745493. The next prime is 99745519. The reversal of 99745515 is 51554799.

99745515 is a `hidden beast` number, since 9 + 97 + 4 + 551 + 5 = 666.

It is not a de Polignac number, because 99745515 - 2¹² = 99741419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (99745519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21466 + ... + 25695.

It is an arithmetic number, because the mean of its divisors is an integer number (7357272).

Almost surely, 2^99745515 is an apocalyptic number.

99745515 is a deficient number, since it is larger than the sum of its proper divisors (76829013).

99745515 is a wasteful number, since it uses less digits than its factorization.

99745515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47219 (or 47216 counting only the distinct ones).

The product of its digits is 283500, while the sum is 45.

The square root of 99745515 is about 9987.2676443560. The cubic root of 99745515 is about 463.7648106419.

The spelling of 99745515 in words is "ninety-nine million, seven hundred forty-five thousand, five hundred fifteen".