212457992442 has 16 divisors (see below), whose sum is σ = 428017563072. Its totient is φ = 70302401120.

The previous prime is 212457992431. The next prime is 212457992443. The reversal of 212457992442 is 244299754212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (212457992443) 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, 129231534 + ... + 129233177.

It is an arithmetic number, because the mean of its divisors is an integer number (26751097692).

Almost surely, 2^212457992442 is an apocalyptic number.

212457992442 is an abundant number, since it is smaller than the sum of its proper divisors (215559570630).

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

212457992442 is a wasteful number, since it uses less digits than its factorization.

212457992442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258464853.

The product of its digits is 2903040, while the sum is 51.

The spelling of 212457992442 in words is "two hundred twelve billion, four hundred fifty-seven million, nine hundred ninety-two thousand, four hundred forty-two".