22451005309 has 4 divisors (see below), whose sum is σ = 22464037216. Its totient is φ = 22437973404.

The previous prime is 22451005303. The next prime is 22451005331. The reversal of 22451005309 is 90350015422.

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 22451005309 - 2¹⁵ = 22450972541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22451005303) 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, 6513369 + ... + 6516814.

It is an arithmetic number, because the mean of its divisors is an integer number (5616009304).

Almost surely, 2^22451005309 is an apocalyptic number.

It is an amenable number.

22451005309 is a deficient number, since it is larger than the sum of its proper divisors (13031907).

22451005309 is a wasteful number, since it uses less digits than its factorization.

22451005309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031906.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 22451005309 in words is "twenty-two billion, four hundred fifty-one million, five thousand, three hundred nine".