157255217 has 8 divisors (see below), whose sum is σ = 184577856. Its totient is φ = 131146992.

The previous prime is 157255211. The next prime is 157255223. The reversal of 157255217 is 712552751.

157255217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (157255211) and next prime (157255223).

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 157255217 - 2⁴ = 157255201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157255211) 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, 303323 + ... + 303840.

It is an arithmetic number, because the mean of its divisors is an integer number (23072232).

Almost surely, 2^157255217 is an apocalyptic number.

It is an amenable number.

157255217 is a deficient number, since it is larger than the sum of its proper divisors (27322639).

157255217 is an equidigital number, since it uses as much as digits as its factorization.

157255217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607207.

The product of its digits is 24500, while the sum is 35.

The square root of 157255217 is about 12540.1442176715. The cubic root of 157255217 is about 539.7612307455.

The spelling of 157255217 in words is "one hundred fifty-seven million, two hundred fifty-five thousand, two hundred seventeen".