22251315451 has 4 divisors (see below), whose sum is σ = 22794030504. Its totient is φ = 21708600400.

The previous prime is 22251315407. The next prime is 22251315491. The reversal of 22251315451 is 15451315222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22251315451 - 2²³ = 22242926843 is a prime.

It is a super-2 number, since 2×22251315451² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22251315491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271357465 + ... + 271357546.

It is an arithmetic number, because the mean of its divisors is an integer number (5698507626).

Almost surely, 2^22251315451 is an apocalyptic number.

22251315451 is a deficient number, since it is larger than the sum of its proper divisors (542715053).

22251315451 is an equidigital number, since it uses as much as digits as its factorization.

22251315451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542715052.

The product of its digits is 12000, while the sum is 31.

The spelling of 22251315451 in words is "twenty-two billion, two hundred fifty-one million, three hundred fifteen thousand, four hundred fifty-one".