212064157 has 4 divisors (see below), whose sum is σ = 212378076. Its totient is φ = 211750240.

The previous prime is 212064143. The next prime is 212064169. The reversal of 212064157 is 751460212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145298916 + 66765241 = 12054^2 + 8171^2 .

It is a cyclic number.

It is not a de Polignac number, because 212064157 - 2⁷ = 212064029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212064107) 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 3 ways as a sum of consecutive naturals, for example, 155944 + ... + 157297.

It is an arithmetic number, because the mean of its divisors is an integer number (53094519).

Almost surely, 2^212064157 is an apocalyptic number.

It is an amenable number.

212064157 is a deficient number, since it is larger than the sum of its proper divisors (313919).

212064157 is an equidigital number, since it uses as much as digits as its factorization.

212064157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313918.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 212064157 is about 14562.4227723274. The cubic root of 212064157 is about 596.3333392352. Note that the first 5 decimals are identical.

The spelling of 212064157 in words is "two hundred twelve million, sixty-four thousand, one hundred fifty-seven".