157226397 has 16 divisors (see below), whose sum is σ = 212623488. Its totient is φ = 103332800.

The previous prime is 157226383. The next prime is 157226423. The reversal of 157226397 is 793622751.

It is a cyclic number.

It is not a de Polignac number, because 157226397 - 2¹⁰ = 157225373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157226317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78703 + ... + 80675.

It is an arithmetic number, because the mean of its divisors is an integer number (13288968).

Almost surely, 2^157226397 is an apocalyptic number.

It is an amenable number.

157226397 is a deficient number, since it is larger than the sum of its proper divisors (55397091).

157226397 is a wasteful number, since it uses less digits than its factorization.

157226397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340.

The product of its digits is 158760, while the sum is 42.

The square root of 157226397 is about 12538.9950554261. The cubic root of 157226397 is about 539.7282549046.

The spelling of 157226397 in words is "one hundred fifty-seven million, two hundred twenty-six thousand, three hundred ninety-seven".