213142157 has 2 divisors, whose sum is σ = 213142158. Its totient is φ = 213142156.

The previous prime is 213142147. The next prime is 213142187. The reversal of 213142157 is 751241312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154604356 + 58537801 = 12434^2 + 7651^2 .

It is a cyclic number.

It is not a de Polignac number, because 213142157 - 2⁶ = 213142093 is a prime.

It is a super-2 number, since 2×213142157² = 90859158181225298, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213142147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106571078 + 106571079.

It is an arithmetic number, because the mean of its divisors is an integer number (106571079).

Almost surely, 2^213142157 is an apocalyptic number.

It is an amenable number.

213142157 is a deficient number, since it is larger than the sum of its proper divisors (1).

213142157 is an equidigital number, since it uses as much as digits as its factorization.

213142157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 213142157 is about 14599.3889255681. The cubic root of 213142157 is about 597.3420923380.

Adding to 213142157 its reverse (751241312), we get a palindrome (964383469).

The spelling of 213142157 in words is "two hundred thirteen million, one hundred forty-two thousand, one hundred fifty-seven".