157713621 has 16 divisors (see below), whose sum is σ = 228708480. Its totient is φ = 96091200.

The previous prime is 157713601. The next prime is 157713643. The reversal of 157713621 is 126317751.

It is not a de Polignac number, because 157713621 - 2⁶ = 157713557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157713601) 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, 16081 + ... + 23958.

It is an arithmetic number, because the mean of its divisors is an integer number (14294280).

Almost surely, 2^157713621 is an apocalyptic number.

It is an amenable number.

157713621 is a deficient number, since it is larger than the sum of its proper divisors (70994859).

157713621 is a wasteful number, since it uses less digits than its factorization.

157713621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40156.

The product of its digits is 8820, while the sum is 33.

The square root of 157713621 is about 12558.4083784531. The cubic root of 157713621 is about 540.2851957150.

The spelling of 157713621 in words is "one hundred fifty-seven million, seven hundred thirteen thousand, six hundred twenty-one".