212255436 has 12 divisors (see below), whose sum is σ = 495262712. Its totient is φ = 70751808.

The previous prime is 212255429. The next prime is 212255443. The reversal of 212255436 is 634552212.

It is an interprime number because it is at equal distance from previous prime (212255429) and next prime (212255443).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×212255436² = 90104740223100192, which contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 8843965 + ... + 8843988.

Almost surely, 2^212255436 is an apocalyptic number.

It is an amenable number.

212255436 is an abundant number, since it is smaller than the sum of its proper divisors (283007276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212255436 is a wasteful number, since it uses less digits than its factorization.

212255436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17687960 (or 17687958 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 212255436 is about 14568.9888461760. The cubic root of 212255436 is about 596.5125802225.

The spelling of 212255436 in words is "two hundred twelve million, two hundred fifty-five thousand, four hundred thirty-six".