21532262255 has 32 divisors (see below), whose sum is σ = 31191502848. Its totient is φ = 13956364800.

The previous prime is 21532262201. The next prime is 21532262267. The reversal of 21532262255 is 55226223512.

It is a de Polignac number, because none of the positive numbers 2^k-21532262255 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

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, 184106 + ... + 277415.

It is an arithmetic number, because the mean of its divisors is an integer number (974734464).

Almost surely, 2^21532262255 is an apocalyptic number.

21532262255 is a deficient number, since it is larger than the sum of its proper divisors (9659240593).

21532262255 is a wasteful number, since it uses less digits than its factorization.

21532262255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461607.

The product of its digits is 72000, while the sum is 35.

Adding to 21532262255 its reverse (55226223512), we get a palindrome (76758485767).

The spelling of 21532262255 in words is "twenty-one billion, five hundred thirty-two million, two hundred sixty-two thousand, two hundred fifty-five".