212520435426 has 64 divisors (see below), whose sum is σ = 515033971200. Its totient is φ = 64563153408.

The previous prime is 212520435353. The next prime is 212520435431. The reversal of 212520435426 is 624534025212.

212520435426 is a `hidden beast` number, since 2 + 1 + 25 + 204 + 3 + 5 + 426 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1860591 + ... + 1971506.

It is an arithmetic number, because the mean of its divisors is an integer number (8047405800).

Almost surely, 2^212520435426 is an apocalyptic number.

212520435426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

212520435426 is an abundant number, since it is smaller than the sum of its proper divisors (302513535774).

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

212520435426 is a wasteful number, since it uses less digits than its factorization.

212520435426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832200 (or 3832194 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 212520435426 in words is "two hundred twelve billion, five hundred twenty million, four hundred thirty-five thousand, four hundred twenty-six".