88221855397 has 8 divisors (see below), whose sum is σ = 95570332760. Its totient is φ = 81435556800.

The previous prime is 88221855341. The next prime is 88221855457. The reversal of 88221855397 is 79355812288.

It can be written as a sum of positive squares in 4 ways, for example, as 37073962116 + 51147893281 = 192546^2 + 226159^2 .

It is a de Polignac number, because none of the positive numbers 2^k-88221855397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88221855307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20075604 + ... + 20079997.

It is an arithmetic number, because the mean of its divisors is an integer number (11946291595).

Almost surely, 2^88221855397 is an apocalyptic number.

It is an amenable number.

88221855397 is a deficient number, since it is larger than the sum of its proper divisors (7348477363).

88221855397 is an equidigital number, since it uses as much as digits as its factorization.

88221855397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40155640 (or 40155614 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 58.

The spelling of 88221855397 in words is "eighty-eight billion, two hundred twenty-one million, eight hundred fifty-five thousand, three hundred ninety-seven".