212152306 has 4 divisors (see below), whose sum is σ = 318228462. Its totient is φ = 106076152.

The previous prime is 212152301. The next prime is 212152307. The reversal of 212152306 is 603251212.

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

It can be written as a sum of positive squares in only one way, i.e., 136305625 + 75846681 = 11675^2 + 8709^2 .

It is a super-2 number, since 2×212152306² = 90017201882235272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212152301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53038075 + ... + 53038078.

Almost surely, 2^212152306 is an apocalyptic number.

212152306 is a deficient number, since it is larger than the sum of its proper divisors (106076156).

212152306 is a wasteful number, since it uses less digits than its factorization.

212152306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106076155.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 212152306 is about 14565.4490490338. The cubic root of 212152306 is about 596.4159540226.

It can be divided in two parts, 21215230 and 6, that added together give a square (21215236 = 4606²).

The spelling of 212152306 in words is "two hundred twelve million, one hundred fifty-two thousand, three hundred six".