157021229 has 8 divisors (see below), whose sum is σ = 161451360. Its totient is φ = 152600976.

The previous prime is 157021217. The next prime is 157021247. The reversal of 157021229 is 922120751.

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 157021229 - 2¹⁶ = 156955693 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 (157021279) 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, 39662 + ... + 43440.

It is an arithmetic number, because the mean of its divisors is an integer number (20181420).

Almost surely, 2^157021229 is an apocalyptic number.

It is an amenable number.

157021229 is a deficient number, since it is larger than the sum of its proper divisors (4430131).

157021229 is a wasteful number, since it uses less digits than its factorization.

157021229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 157021229 is about 12530.8111868306. The cubic root of 157021229 is about 539.4933851659.

It can be divided in two parts, 1570 and 21229, that multiplied together give a triangular number (33329530 = T₈₁₆₄).

The spelling of 157021229 in words is "one hundred fifty-seven million, twenty-one thousand, two hundred twenty-nine".