22140497 has 4 divisors (see below), whose sum is σ = 22150656. Its totient is φ = 22130340.

The previous prime is 22140493. The next prime is 22140509. The reversal of 22140497 is 79404122.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22140497 - 2² = 22140493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22140493) 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, 329 + ... + 6662.

It is an arithmetic number, because the mean of its divisors is an integer number (5537664).

Almost surely, 2^22140497 is an apocalyptic number.

It is an amenable number.

22140497 is a deficient number, since it is larger than the sum of its proper divisors (10159).

22140497 is an equidigital number, since it uses as much as digits as its factorization.

22140497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10158.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 22140497 is about 4705.3689547155. The cubic root of 22140497 is about 280.7991497946.

The spelling of 22140497 in words is "twenty-two million, one hundred forty thousand, four hundred ninety-seven".