99215479 has 4 divisors (see below), whose sum is σ = 108235080. Its totient is φ = 90195880.

The previous prime is 99215453. The next prime is 99215483. The reversal of 99215479 is 97451299.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99215479 - 2⁵ = 99215447 is a prime.

It is a super-2 number, since 2×99215479² = 19687422546398882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99215419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4509784 + ... + 4509805.

It is an arithmetic number, because the mean of its divisors is an integer number (27058770).

Almost surely, 2^99215479 is an apocalyptic number.

99215479 is a deficient number, since it is larger than the sum of its proper divisors (9019601).

99215479 is a wasteful number, since it uses less digits than its factorization.

99215479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9019600.

The product of its digits is 204120, while the sum is 46.

The square root of 99215479 is about 9960.6967125799. The cubic root of 99215479 is about 462.9418872900.

It can be divided in two parts, 9921 and 5479, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 99215479 in words is "ninety-nine million, two hundred fifteen thousand, four hundred seventy-nine".