99997255 has 8 divisors (see below), whose sum is σ = 120315600. Its totient is φ = 79785216.

The previous prime is 99997243. The next prime is 99997267. The reversal of 99997255 is 55279999.

It is an interprime number because it is at equal distance from previous prime (99997243) and next prime (99997267).

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 99997255 - 2⁷ = 99997127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99997196 and 99997205.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24490 + ... + 28279.

It is an arithmetic number, because the mean of its divisors is an integer number (15039450).

Almost surely, 2^99997255 is an apocalyptic number.

99997255 is a deficient number, since it is larger than the sum of its proper divisors (20318345).

99997255 is a wasteful number, since it uses less digits than its factorization.

99997255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53153.

The product of its digits is 2296350, while the sum is 55.

The square root of 99997255 is about 9999.8627490581. The cubic root of 99997255 is about 464.1546362686.

The spelling of 99997255 in words is "ninety-nine million, nine hundred ninety-seven thousand, two hundred fifty-five".