22637501 has 2 divisors, whose sum is σ = 22637502. Its totient is φ = 22637500.

The previous prime is 22637431. The next prime is 22637509. The reversal of 22637501 is 10573622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13697401 + 8940100 = 3701^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 22637501 - 2¹⁰ = 22636477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22637509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11318750 + 11318751.

It is an arithmetic number, because the mean of its divisors is an integer number (11318751).

Almost surely, 2^22637501 is an apocalyptic number.

It is an amenable number.

22637501 is a deficient number, since it is larger than the sum of its proper divisors (1).

22637501 is an equidigital number, since it uses as much as digits as its factorization.

22637501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 22637501 is about 4757.8882920893. Note that the first 3 decimals coincide. The cubic root of 22637501 is about 282.8847229097.

The spelling of 22637501 in words is "twenty-two million, six hundred thirty-seven thousand, five hundred one".