157428199 has 4 divisors (see below), whose sum is σ = 162506560. Its totient is φ = 152349840.

The previous prime is 157428197. The next prime is 157428209. The reversal of 157428199 is 991824751.

157428199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991824751 = 59 ⋅16810589.

It is a cyclic number.

It is not a de Polignac number, because 157428199 - 2¹ = 157428197 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 (157428197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2539134 + ... + 2539195.

It is an arithmetic number, because the mean of its divisors is an integer number (40626640).

Almost surely, 2^157428199 is an apocalyptic number.

157428199 is a deficient number, since it is larger than the sum of its proper divisors (5078361).

157428199 is an equidigital number, since it uses as much as digits as its factorization.

157428199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078360.

The product of its digits is 181440, while the sum is 46.

The square root of 157428199 is about 12547.0394515997. The cubic root of 157428199 is about 539.9590721152.

The spelling of 157428199 in words is "one hundred fifty-seven million, four hundred twenty-eight thousand, one hundred ninety-nine".