157212213 has 8 divisors (see below), whose sum is σ = 220648800. Its totient is φ = 99291888.

The previous prime is 157212169. The next prime is 157212221. The reversal of 157212213 is 312212751.

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

It is not a de Polignac number, because 157212213 - 2²⁴ = 140434997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157212233) 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, 1378998 + ... + 1379111.

It is an arithmetic number, because the mean of its divisors is an integer number (27581100).

Almost surely, 2^157212213 is an apocalyptic number.

It is an amenable number.

157212213 is a deficient number, since it is larger than the sum of its proper divisors (63436587).

157212213 is a wasteful number, since it uses less digits than its factorization.

157212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758131.

The product of its digits is 840, while the sum is 24.

The square root of 157212213 is about 12538.4294471038. The cubic root of 157212213 is about 539.7120240936.

Adding to 157212213 its reverse (312212751), we get a palindrome (469424964).

The spelling of 157212213 in words is "one hundred fifty-seven million, two hundred twelve thousand, two hundred thirteen".