22251003621761 has 4 divisors (see below), whose sum is σ = 22501014898500. Its totient is φ = 22000992345024.

The previous prime is 22251003621713. The next prime is 22251003621767. The reversal of 22251003621761 is 16712630015222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12650648400625 + 9600355221136 = 3556775^2 + 3098444^2 .

It is a cyclic number.

It is not a de Polignac number, because 22251003621761 - 2²² = 22250999427457 is a prime.

It is a super-2 number, since 2×22251003621761² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22251003621767) 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, 125005638236 + ... + 125005638413.

It is an arithmetic number, because the mean of its divisors is an integer number (5625253724625).

Almost surely, 2^{22251003621761} is an apocalyptic number.

It is an amenable number.

22251003621761 is a deficient number, since it is larger than the sum of its proper divisors (250011276739).

22251003621761 is an equidigital number, since it uses as much as digits as its factorization.

22251003621761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250011276738.

The product of its (nonzero) digits is 60480, while the sum is 38.

Adding to 22251003621761 its reverse (16712630015222), we get a palindrome (38963633636983).

The spelling of 22251003621761 in words is "twenty-two trillion, two hundred fifty-one billion, three million, six hundred twenty-one thousand, seven hundred sixty-one".