220525540099981 has 4 divisors (see below), whose sum is σ = 220526358892000. Its totient is φ = 220524721307964.

The previous prime is 220525540099961. The next prime is 220525540100017. The reversal of 220525540099981 is 189990045525022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220525540099981 is a prime.

It is a super-2 number, since 2×220525540099981² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220525540099961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408991881 + ... + 409530718.

It is an arithmetic number, because the mean of its divisors is an integer number (55131589723000).

Almost surely, 2^{220525540099981} is an apocalyptic number.

It is an amenable number.

220525540099981 is a deficient number, since it is larger than the sum of its proper divisors (818792019).

220525540099981 is an equidigital number, since it uses as much as digits as its factorization.

220525540099981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818792018.

The product of its (nonzero) digits is 23328000, while the sum is 61.

The spelling of 220525540099981 in words is "two hundred twenty trillion, five hundred twenty-five billion, five hundred forty million, ninety-nine thousand, nine hundred eighty-one".