212162540 has 12 divisors (see below), whose sum is σ = 445541376. Its totient is φ = 84865008.

The previous prime is 212162539. The next prime is 212162581. The reversal of 212162540 is 45261212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5304044 + ... + 5304083.

It is an arithmetic number, because the mean of its divisors is an integer number (37128448).

Almost surely, 2^212162540 is an apocalyptic number.

212162540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212162540 is an abundant number, since it is smaller than the sum of its proper divisors (233378836).

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

212162540 is a wasteful number, since it uses less digits than its factorization.

212162540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10608136 (or 10608134 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 212162540 is about 14565.8003556276. The cubic root of 212162540 is about 596.4255440240.

The spelling of 212162540 in words is "two hundred twelve million, one hundred sixty-two thousand, five hundred forty".