213997991340 has 96 divisors (see below), whose sum is σ = 688269947904. Its totient is φ = 48665514240.

The previous prime is 213997991257. The next prime is 213997991351. The reversal of 213997991340 is 43199799312.

213997991340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1210456 + ... + 1375935.

It is an arithmetic number, because the mean of its divisors is an integer number (7169478624).

Almost surely, 2^213997991340 is an apocalyptic number.

213997991340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213997991340 is an abundant number, since it is smaller than the sum of its proper divisors (474271956564).

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

213997991340 is a wasteful number, since it uses less digits than its factorization.

213997991340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586607 (or 2586605 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 57.

The spelling of 213997991340 in words is "two hundred thirteen billion, nine hundred ninety-seven million, nine hundred ninety-one thousand, three hundred forty".