157228197 has 8 divisors (see below), whose sum is σ = 239585856. Its totient is φ = 89844672.

The previous prime is 157228139. The next prime is 157228213. The reversal of 157228197 is 791822751.

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

It is not a de Polignac number, because 157228197 - 2¹² = 157224101 is a prime.

It is a super-4 number, since 4×157228197⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157228697) 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, 3743508 + ... + 3743549.

It is an arithmetic number, because the mean of its divisors is an integer number (29948232).

Almost surely, 2^157228197 is an apocalyptic number.

It is an amenable number.

157228197 is a deficient number, since it is larger than the sum of its proper divisors (82357659).

157228197 is an equidigital number, since it uses as much as digits as its factorization.

157228197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487067.

The product of its digits is 70560, while the sum is 42.

The square root of 157228197 is about 12539.0668313077. The cubic root of 157228197 is about 539.7303145824.

The spelling of 157228197 in words is "one hundred fifty-seven million, two hundred twenty-eight thousand, one hundred ninety-seven".