213561605140440 has 64 divisors (see below), whose sum is σ = 649461319768800. Its totient is φ = 56169627651072.

The previous prime is 213561605140439. The next prime is 213561605140453. The reversal of 213561605140440 is 44041506165312.

It is a super-2 number, since 2×213561605140440² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213561605140392 and 213561605140401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12189580575 + ... + 12189598094.

Almost surely, 2^{213561605140440} is an apocalyptic number.

213561605140440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213561605140440 is an abundant number, since it is smaller than the sum of its proper divisors (435899714628360).

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

213561605140440 is a wasteful number, since it uses less digits than its factorization.

213561605140440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24379178756 (or 24379178752 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 213561605140440 in words is "two hundred thirteen trillion, five hundred sixty-one billion, six hundred five million, one hundred forty thousand, four hundred forty".