157228715 has 8 divisors (see below), whose sum is σ = 215628000. Its totient is φ = 107813952.

The previous prime is 157228711. The next prime is 157228741. The reversal of 157228715 is 517822751.

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

It is a cyclic number.

It is not a de Polignac number, because 157228715 - 2² = 157228711 is a prime.

It is a super-4 number, since 4×157228715⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (157228711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246090 + ... + 2246159.

It is an arithmetic number, because the mean of its divisors is an integer number (26953500).

Almost surely, 2^157228715 is an apocalyptic number.

157228715 is a deficient number, since it is larger than the sum of its proper divisors (58399285).

157228715 is an equidigital number, since it uses as much as digits as its factorization.

157228715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492261.

The product of its digits is 39200, while the sum is 38.

The square root of 157228715 is about 12539.0874867352. The cubic root of 157228715 is about 539.7309073089.

The spelling of 157228715 in words is "one hundred fifty-seven million, two hundred twenty-eight thousand, seven hundred fifteen".