212045464491 has 48 divisors (see below), whose sum is σ = 332587503360. Its totient is φ = 119809730880.

The previous prime is 212045464471. The next prime is 212045464507. The reversal of 212045464491 is 194464540212.

It is not a de Polignac number, because 212045464491 - 2²³ = 212037075883 is a prime.

It is a super-2 number, since 2×212045464491² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212045464441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8496930 + ... + 8521848.

It is an arithmetic number, because the mean of its divisors is an integer number (6928906320).

Almost surely, 2^212045464491 is an apocalyptic number.

212045464491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212045464491 is a deficient number, since it is larger than the sum of its proper divisors (120542038869).

212045464491 is a wasteful number, since it uses less digits than its factorization.

212045464491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25584 (or 25577 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 212045464491 in words is "two hundred twelve billion, forty-five million, four hundred sixty-four thousand, four hundred ninety-one".