157217289 has 8 divisors (see below), whose sum is σ = 209806752. Its totient is φ = 104719680.

The previous prime is 157217261. The next prime is 157217297. The reversal of 157217289 is 982712751.

157217289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 157217289 - 2¹⁷ = 157086217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157217289.

It is not an unprimeable number, because it can be changed into a prime (157217219) 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, 18864 + ... + 25889.

It is an arithmetic number, because the mean of its divisors is an integer number (26225844).

Almost surely, 2^157217289 is an apocalyptic number.

It is an amenable number.

157217289 is a deficient number, since it is larger than the sum of its proper divisors (52589463).

157217289 is a wasteful number, since it uses less digits than its factorization.

157217289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45927.

The product of its digits is 70560, while the sum is 42.

The square root of 157217289 is about 12538.6318631659. The cubic root of 157217289 is about 539.7178326940.

The spelling of 157217289 in words is "one hundred fifty-seven million, two hundred seventeen thousand, two hundred eighty-nine".