22531505 has 4 divisors (see below), whose sum is σ = 27037812. Its totient is φ = 18025200.

The previous prime is 22531493. The next prime is 22531543. The reversal of 22531505 is 50513522.

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 4545424 + 17986081 = 2132^2 + 4241^2 .

It is not a de Polignac number, because 22531505 - 2⁴ = 22531489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253146 + ... + 2253155.

It is an arithmetic number, because the mean of its divisors is an integer number (6759453).

Almost surely, 2^22531505 is an apocalyptic number.

It is an amenable number.

22531505 is a deficient number, since it is larger than the sum of its proper divisors (4506307).

22531505 is an equidigital number, since it uses as much as digits as its factorization.

22531505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506306.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 22531505 is about 4746.7362471492. The cubic root of 22531505 is about 282.4425131675.

The spelling of 22531505 in words is "twenty-two million, five hundred thirty-one thousand, five hundred five".