22471561450513 has 4 divisors (see below), whose sum is σ = 25681784514880. Its totient is φ = 19261338386148.

The previous prime is 22471561450463. The next prime is 22471561450523. The reversal of 22471561450513 is 31505416517422.

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 not a de Polignac number, because 22471561450513 - 2²¹ = 22471559353361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22471561450523) 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, 1605111532173 + ... + 1605111532186.

It is an arithmetic number, because the mean of its divisors is an integer number (6420446128720).

Almost surely, 2^{22471561450513} is an apocalyptic number.

It is an amenable number.

22471561450513 is a deficient number, since it is larger than the sum of its proper divisors (3210223064367).

22471561450513 is an equidigital number, since it uses as much as digits as its factorization.

22471561450513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210223064366.

The product of its (nonzero) digits is 1008000, while the sum is 46.

Adding to 22471561450513 its reverse (31505416517422), we get a palindrome (53976977967935).

The spelling of 22471561450513 in words is "twenty-two trillion, four hundred seventy-one billion, five hundred sixty-one million, four hundred fifty thousand, five hundred thirteen".