222623451 has 32 divisors (see below), whose sum is σ = 335301120. Its totient is φ = 145969632.

The previous prime is 222623407. The next prime is 222623473. The reversal of 222623451 is 154326222.

It is a happy number.

It is not a de Polignac number, because 222623451 - 2¹⁰ = 222622427 is a prime.

It is a super-2 number, since 2×222623451² = 99122401870298802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (222623491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 759661 + ... + 759953.

It is an arithmetic number, because the mean of its divisors is an integer number (10478160).

Almost surely, 2^222623451 is an apocalyptic number.

222623451 is a deficient number, since it is larger than the sum of its proper divisors (112677669).

222623451 is a wasteful number, since it uses less digits than its factorization.

222623451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 666 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 222623451 is about 14920.5714032674. The cubic root of 222623451 is about 606.0711856382.

Adding to 222623451 its reverse (154326222), we get a palindrome (376949673).

The spelling of 222623451 in words is "two hundred twenty-two million, six hundred twenty-three thousand, four hundred fifty-one".