102157215 has 8 divisors (see below), whose sum is σ = 163451568. Its totient is φ = 54483840.

The previous prime is 102157213. The next prime is 102157217. The reversal of 102157215 is 512751201.

It is an interprime number because it is at equal distance from previous prime (102157213) and next prime (102157217).

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

It is not a de Polignac number, because 102157215 - 2¹ = 102157213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102157213) 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, 3405226 + ... + 3405255.

It is an arithmetic number, because the mean of its divisors is an integer number (20431446).

Almost surely, 2^102157215 is an apocalyptic number.

102157215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102157215 is a deficient number, since it is larger than the sum of its proper divisors (61294353).

102157215 is an equidigital number, since it uses as much as digits as its factorization.

102157215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810489.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 102157215 is about 10107.2852438229. The cubic root of 102157215 is about 467.4728019485.

The spelling of 102157215 in words is "one hundred two million, one hundred fifty-seven thousand, two hundred fifteen".