157840207 has 8 divisors (see below), whose sum is σ = 180525056. Its totient is φ = 135189432.

The previous prime is 157840181. The next prime is 157840211. The reversal of 157840207 is 702048751.

It is a happy number.

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

It is not a de Polignac number, because 157840207 - 2⁷ = 157840079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157840247) 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, 2338 + ... + 17920.

It is an arithmetic number, because the mean of its divisors is an integer number (22565632).

Almost surely, 2^157840207 is an apocalyptic number.

157840207 is a deficient number, since it is larger than the sum of its proper divisors (22684849).

157840207 is a wasteful number, since it uses less digits than its factorization.

157840207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17037.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 157840207 is about 12563.4472578190. The cubic root of 157840207 is about 540.4297071223.

Adding to 157840207 its reverse (702048751), we get a palindrome (859888958).

The spelling of 157840207 in words is "one hundred fifty-seven million, eight hundred forty thousand, two hundred seven".