22497487 has 2 divisors, whose sum is σ = 22497488. Its totient is φ = 22497486.

The previous prime is 22497469. The next prime is 22497529. The reversal of 22497487 is 78479422.

22497487 is nontrivially palindromic in base 12.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22497487 - 2¹⁵ = 22464719 is a prime.

It is a super-2 number, since 2×22497487² = 1012273842630338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22497437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11248743 + 11248744.

It is an arithmetic number, because the mean of its divisors is an integer number (11248744).

Almost surely, 2^22497487 is an apocalyptic number.

22497487 is a deficient number, since it is larger than the sum of its proper divisors (1).

22497487 is an equidigital number, since it uses as much as digits as its factorization.

22497487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 43.

The square root of 22497487 is about 4743.1515893971. The cubic root of 22497487 is about 282.3002979461.

The spelling of 22497487 in words is "twenty-two million, four hundred ninety-seven thousand, four hundred eighty-seven".