213655088820 has 96 divisors (see below), whose sum is σ = 614803867776. Its totient is φ = 55398643200.

The previous prime is 213655088789. The next prime is 213655088831. The reversal of 213655088820 is 28880556312.

It is a self number, because there is not a number n which added to its sum of digits gives 213655088820.

It is a congruent number.

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, 3456990 + ... + 3518250.

It is an arithmetic number, because the mean of its divisors is an integer number (6404206956).

Almost surely, 2^213655088820 is an apocalyptic number.

213655088820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213655088820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307401933888).

213655088820 is an abundant number, since it is smaller than the sum of its proper divisors (401148778956).

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

213655088820 is a wasteful number, since it uses less digits than its factorization.

213655088820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62881 (or 62879 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 213655088820 in words is "two hundred thirteen billion, six hundred fifty-five million, eighty-eight thousand, eight hundred twenty".