212113157 has 2 divisors, whose sum is σ = 212113158. Its totient is φ = 212113156.

The previous prime is 212113147. The next prime is 212113171. The reversal of 212113157 is 751311212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150160516 + 61952641 = 12254^2 + 7871^2 .

It is a cyclic number.

It is not a de Polignac number, because 212113157 - 2⁴ = 212113141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212113117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056578 + 106056579.

It is an arithmetic number, because the mean of its divisors is an integer number (106056579).

Almost surely, 2^212113157 is an apocalyptic number.

It is an amenable number.

212113157 is a deficient number, since it is larger than the sum of its proper divisors (1).

212113157 is an equidigital number, since it uses as much as digits as its factorization.

212113157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 23.

The square root of 212113157 is about 14564.1050875088. The cubic root of 212113157 is about 596.3792657192.

Adding to 212113157 its reverse (751311212), we get a palindrome (963424369).

The spelling of 212113157 in words is "two hundred twelve million, one hundred thirteen thousand, one hundred fifty-seven".