221513055435 has 96 divisors (see below), whose sum is σ = 462053928960. Its totient is φ = 95901905664.

The previous prime is 221513055403. The next prime is 221513055457. The reversal of 221513055435 is 534550315122.

221513055435 is a `hidden beast` number, since 2 + 21 + 51 + 3 + 0 + 554 + 35 = 666.

It is not a de Polignac number, because 221513055435 - 2⁵ = 221513055403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221513055435.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34787622 + ... + 34793988.

It is an arithmetic number, because the mean of its divisors is an integer number (4813061760).

Almost surely, 2^221513055435 is an apocalyptic number.

221513055435 is an abundant number, since it is smaller than the sum of its proper divisors (240540873525).

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

221513055435 is a wasteful number, since it uses less digits than its factorization.

221513055435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12217 (or 12214 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 221513055435 in words is "two hundred twenty-one billion, five hundred thirteen million, fifty-five thousand, four hundred thirty-five".