22520137 has 2 divisors, whose sum is σ = 22520138. Its totient is φ = 22520136.

The previous prime is 22520131. The next prime is 22520143. The reversal of 22520137 is 73102522.

It is a balanced prime because it is at equal distance from previous prime (22520131) and next prime (22520143).

It can be written as a sum of positive squares in only one way, i.e., 19193161 + 3326976 = 4381^2 + 1824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22520137 is a prime.

It is not a weakly prime, because it can be changed into another prime (22520131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260068 + 11260069.

It is an arithmetic number, because the mean of its divisors is an integer number (11260069).

Almost surely, 2^22520137 is an apocalyptic number.

It is an amenable number.

22520137 is a deficient number, since it is larger than the sum of its proper divisors (1).

22520137 is an equidigital number, since it uses as much as digits as its factorization.

22520137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 22520137 is about 4745.5386417139. The cubic root of 22520137 is about 282.3950041850.

Adding to 22520137 its reverse (73102522), we get a palindrome (95622659).

The spelling of 22520137 in words is "twenty-two million, five hundred twenty thousand, one hundred thirty-seven".