212911240 has 32 divisors (see below), whose sum is σ = 479880000. Its totient is φ = 85017024.

The previous prime is 212911201. The next prime is 212911249. The reversal of 212911240 is 42119212.

It is a super-2 number, since 2×212911240² = 90662392236675200, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (212911249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20461 + ... + 29059.

It is an arithmetic number, because the mean of its divisors is an integer number (14996250).

Almost surely, 2^212911240 is an apocalyptic number.

212911240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212911240 is an abundant number, since it is smaller than the sum of its proper divisors (266968760).

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

212911240 is a wasteful number, since it uses less digits than its factorization.

212911240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9229 (or 9225 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 212911240 is about 14591.4783349735. The cubic root of 212911240 is about 597.1262953803.

The spelling of 212911240 in words is "two hundred twelve million, nine hundred eleven thousand, two hundred forty".