213238767640 has 64 divisors (see below), whose sum is σ = 508102774560. Its totient is φ = 80263464960.

The previous prime is 213238767629. The next prime is 213238767661. The reversal of 213238767640 is 46767832312.

It is a super-2 number, since 2×213238767640² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4144875 + ... + 4196005.

Almost surely, 2^213238767640 is an apocalyptic number.

213238767640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213238767640 is an abundant number, since it is smaller than the sum of its proper divisors (294864006920).

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

213238767640 is a wasteful number, since it uses less digits than its factorization.

213238767640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57292 (or 57288 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 213238767640 in words is "two hundred thirteen billion, two hundred thirty-eight million, seven hundred sixty-seven thousand, six hundred forty".