157429217 has 16 divisors (see below), whose sum is σ = 177690240. Its totient is φ = 138230400.

The previous prime is 157429199. The next prime is 157429219. The reversal of 157429217 is 712924751.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-157429217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157429219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44759 + ... + 48147.

It is an arithmetic number, because the mean of its divisors is an integer number (11105640).

Almost surely, 2^157429217 is an apocalyptic number.

It is an amenable number.

157429217 is a deficient number, since it is larger than the sum of its proper divisors (20261023).

157429217 is a wasteful number, since it uses less digits than its factorization.

157429217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544.

The product of its digits is 35280, while the sum is 38.

The square root of 157429217 is about 12547.0800188729. The cubic root of 157429217 is about 539.9602359837.

The spelling of 157429217 in words is "one hundred fifty-seven million, four hundred twenty-nine thousand, two hundred seventeen".