22721498 has 4 divisors (see below), whose sum is σ = 34082250. Its totient is φ = 11360748.

The previous prime is 22721483. The next prime is 22721507. The reversal of 22721498 is 89412722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22534009 + 187489 = 4747^2 + 433^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5680373 + ... + 5680376.

Almost surely, 2^22721498 is an apocalyptic number.

22721498 is a deficient number, since it is larger than the sum of its proper divisors (11360752).

22721498 is a wasteful number, since it uses less digits than its factorization.

22721498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11360751.

The product of its digits is 16128, while the sum is 35.

The square root of 22721498 is about 4766.7072492445. The cubic root of 22721498 is about 283.2341746054.

The spelling of 22721498 in words is "twenty-two million, seven hundred twenty-one thousand, four hundred ninety-eight".