212375557 has 2 divisors, whose sum is σ = 212375558. Its totient is φ = 212375556.

The previous prime is 212375549. The next prime is 212375561. The reversal of 212375557 is 755573212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212022721 + 352836 = 14561^2 + 594^2 .

It is a cyclic number.

It is not a de Polignac number, because 212375557 - 2³ = 212375549 is a prime.

It is a super-2 number, since 2×212375557² = 90206754422120498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212375507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106187778 + 106187779.

It is an arithmetic number, because the mean of its divisors is an integer number (106187779).

Almost surely, 2^212375557 is an apocalyptic number.

It is an amenable number.

212375557 is a deficient number, since it is larger than the sum of its proper divisors (1).

212375557 is an equidigital number, since it uses as much as digits as its factorization.

212375557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73500, while the sum is 37.

The square root of 212375557 is about 14573.1107523411. The cubic root of 212375557 is about 596.6250864498.

It can be divided in two parts, 212 and 375557, that added together give a square (375769 = 613²).

The spelling of 212375557 in words is "two hundred twelve million, three hundred seventy-five thousand, five hundred fifty-seven".