21451332422255 has 16 divisors (see below), whose sum is σ = 25800635234304. Its totient is φ = 17121711179040.

The previous prime is 21451332422249. The next prime is 21451332422279. The reversal of 21451332422255 is 55222423315412.

It is not a de Polignac number, because 21451332422255 - 2¹⁴ = 21451332405871 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 67245542 + ... + 67563788.

It is an arithmetic number, because the mean of its divisors is an integer number (1612539702144).

Almost surely, 2^{21451332422255} is an apocalyptic number.

21451332422255 is a deficient number, since it is larger than the sum of its proper divisors (4349302812049).

21451332422255 is a wasteful number, since it uses less digits than its factorization.

21451332422255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349126.

The product of its digits is 576000, while the sum is 41.

Adding to 21451332422255 its reverse (55222423315412), we get a palindrome (76673755737667).

The spelling of 21451332422255 in words is "twenty-one trillion, four hundred fifty-one billion, three hundred thirty-two million, four hundred twenty-two thousand, two hundred fifty-five".