72143422 has 32 divisors (see below), whose sum is σ = 120260448. Its totient is φ = 32247936.

The previous prime is 72143413. The next prime is 72143431. The reversal of 72143422 is 22434127.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72143413) and next prime (72143431).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 193228 + ... + 193600.

It is an arithmetic number, because the mean of its divisors is an integer number (3758139).

Almost surely, 2^72143422 is an apocalyptic number.

72143422 is a deficient number, since it is larger than the sum of its proper divisors (48117026).

72143422 is a wasteful number, since it uses less digits than its factorization.

72143422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604.

The product of its digits is 2688, while the sum is 25.

The square root of 72143422 is about 8493.7283921727. The cubic root of 72143422 is about 416.2928126778.

Adding to 72143422 its reverse (22434127), we get a palindrome (94577549).

The spelling of 72143422 in words is "seventy-two million, one hundred forty-three thousand, four hundred twenty-two".