22418157 has 8 divisors (see below), whose sum is σ = 31464160. Its totient is φ = 14158800.

The previous prime is 22418147. The next prime is 22418159. The reversal of 22418157 is 75181422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22418157 - 2¹¹ = 22416109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22418159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196594 + ... + 196707.

It is an arithmetic number, because the mean of its divisors is an integer number (3933020).

Almost surely, 2^22418157 is an apocalyptic number.

It is an amenable number.

22418157 is a deficient number, since it is larger than the sum of its proper divisors (9046003).

22418157 is a wasteful number, since it uses less digits than its factorization.

22418157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393323.

The product of its digits is 4480, while the sum is 30.

The square root of 22418157 is about 4734.7816211521. The cubic root of 22418157 is about 281.9680940715.

Adding to 22418157 its reverse (75181422), we get a palindrome (97599579).

It can be divided in two parts, 224 and 18157, that added together give a palindrome (18381).

The spelling of 22418157 in words is "twenty-two million, four hundred eighteen thousand, one hundred fifty-seven".