157338217 has 4 divisors (see below), whose sum is σ = 159329920. Its totient is φ = 155346516.

The previous prime is 157338211. The next prime is 157338277. The reversal of 157338217 is 712833751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712833751 = 7 ⋅101833393.

It is a cyclic number.

It is not a de Polignac number, because 157338217 - 2⁷ = 157338089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157338211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995733 + ... + 995890.

It is an arithmetic number, because the mean of its divisors is an integer number (39832480).

Almost surely, 2^157338217 is an apocalyptic number.

It is an amenable number.

157338217 is a deficient number, since it is larger than the sum of its proper divisors (1991703).

157338217 is an equidigital number, since it uses as much as digits as its factorization.

157338217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991702.

The product of its digits is 35280, while the sum is 37.

The square root of 157338217 is about 12543.4531529400. The cubic root of 157338217 is about 539.8561768325.

The spelling of 157338217 in words is "one hundred fifty-seven million, three hundred thirty-eight thousand, two hundred seventeen".