22001497 has 4 divisors (see below), whose sum is σ = 25144576. Its totient is φ = 18858420.

The previous prime is 22001467. The next prime is 22001503. The reversal of 22001497 is 79410022.

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 an emirpimes, since its reverse is a distinct semiprime: 79410022 = 2 ⋅39705011.

It is not a de Polignac number, because 22001497 - 2¹¹ = 21999449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001467) 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, 1571529 + ... + 1571542.

It is an arithmetic number, because the mean of its divisors is an integer number (6286144).

Almost surely, 2^22001497 is an apocalyptic number.

It is an amenable number.

22001497 is a deficient number, since it is larger than the sum of its proper divisors (3143079).

22001497 is an equidigital number, since it uses as much as digits as its factorization.

22001497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143078.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 22001497 is about 4690.5753378450. The cubic root of 22001497 is about 280.2102884561.

The spelling of 22001497 in words is "twenty-two million, one thousand, four hundred ninety-seven".