157020213 has 16 divisors (see below), whose sum is σ = 240330240. Its totient is φ = 89327856.

The previous prime is 157020209. The next prime is 157020217. The reversal of 157020213 is 312020751.

It is an interprime number because it is at equal distance from previous prime (157020209) and next prime (157020217).

It is not a de Polignac number, because 157020213 - 2² = 157020209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 157020213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157020217) 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, 11703 + ... + 21236.

It is an arithmetic number, because the mean of its divisors is an integer number (15020640).

Almost surely, 2^157020213 is an apocalyptic number.

It is an amenable number.

157020213 is a deficient number, since it is larger than the sum of its proper divisors (83310027).

157020213 is a wasteful number, since it uses less digits than its factorization.

157020213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33176.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 157020213 is about 12530.7706466921. The cubic root of 157020213 is about 539.4922215728.

Adding to 157020213 its reverse (312020751), we get a palindrome (469040964).

The spelling of 157020213 in words is "one hundred fifty-seven million, twenty thousand, two hundred thirteen".