157211017 has 4 divisors (see below), whose sum is σ = 157330816. Its totient is φ = 157091220.

The previous prime is 157211009. The next prime is 157211023. The reversal of 157211017 is 710112751.

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: 710112751 = 79 ⋅8988769.

It is a cyclic number.

It is not a de Polignac number, because 157211017 - 2³ = 157211009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157210982 and 157211000.

It is not an unprimeable number, because it can be changed into a prime (157211057) 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, 57909 + ... + 60562.

It is an arithmetic number, because the mean of its divisors is an integer number (39332704).

Almost surely, 2^157211017 is an apocalyptic number.

It is an amenable number.

157211017 is a deficient number, since it is larger than the sum of its proper divisors (119799).

157211017 is a wasteful number, since it uses less digits than its factorization.

157211017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119798.

The product of its (nonzero) digits is 490, while the sum is 25.

The square root of 157211017 is about 12538.3817536395. The cubic root of 157211017 is about 539.7106554611.

Adding to 157211017 its reverse (710112751), we get a palindrome (867323768).

The spelling of 157211017 in words is "one hundred fifty-seven million, two hundred eleven thousand, seventeen".