157057217 has 8 divisors (see below), whose sum is σ = 159071232. Its totient is φ = 155055600.

The previous prime is 157057213. The next prime is 157057247. The reversal of 157057217 is 712750751.

It is a happy number.

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 157057217 - 2² = 157057213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157057213) 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, 23867 + ... + 29727.

It is an arithmetic number, because the mean of its divisors is an integer number (19883904).

Almost surely, 2^157057217 is an apocalyptic number.

It is an amenable number.

157057217 is a deficient number, since it is larger than the sum of its proper divisors (2014015).

157057217 is a wasteful number, since it uses less digits than its factorization.

157057217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199.

The product of its (nonzero) digits is 17150, while the sum is 35.

The square root of 157057217 is about 12532.2470850203. The cubic root of 157057217 is about 539.5345978626.

It can be divided in two parts, 15705 and 7217, that added together give a palindrome (22922).

The spelling of 157057217 in words is "one hundred fifty-seven million, fifty-seven thousand, two hundred seventeen".