22478151 has 4 divisors (see below), whose sum is σ = 29970872. Its totient is φ = 14985432.

The previous prime is 22478149. The next prime is 22478167. The reversal of 22478151 is 15187422.

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

It is not a de Polignac number, because 22478151 - 2¹ = 22478149 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 (22478251) 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, 3746356 + ... + 3746361.

It is an arithmetic number, because the mean of its divisors is an integer number (7492718).

Almost surely, 2^22478151 is an apocalyptic number.

22478151 is a deficient number, since it is larger than the sum of its proper divisors (7492721).

22478151 is an equidigital number, since it uses as much as digits as its factorization.

22478151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7492720.

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

The square root of 22478151 is about 4741.1128440483. The cubic root of 22478151 is about 282.2193981974.

The spelling of 22478151 in words is "twenty-two million, four hundred seventy-eight thousand, one hundred fifty-one".