22347457 has 4 divisors (see below), whose sum is σ = 24379056. Its totient is φ = 20315860.

The previous prime is 22347443. The next prime is 22347491. The reversal of 22347457 is 75474322.

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.

It is a cyclic number.

It is not a de Polignac number, because 22347457 - 2¹⁹ = 21823169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22347407) 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, 1015783 + ... + 1015804.

It is an arithmetic number, because the mean of its divisors is an integer number (6094764).

Almost surely, 2^22347457 is an apocalyptic number.

It is an amenable number.

22347457 is a deficient number, since it is larger than the sum of its proper divisors (2031599).

22347457 is a wasteful number, since it uses less digits than its factorization.

22347457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031598.

The product of its digits is 47040, while the sum is 34.

The square root of 22347457 is about 4727.3097000302. The cubic root of 22347457 is about 281.6713682599.

The spelling of 22347457 in words is "twenty-two million, three hundred forty-seven thousand, four hundred fifty-seven".