72215246 has 4 divisors (see below), whose sum is σ = 108322872. Its totient is φ = 36107622.

The previous prime is 72215237. The next prime is 72215251. The reversal of 72215246 is 64251227.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18053810 + ... + 18053813.

It is an arithmetic number, because the mean of its divisors is an integer number (27080718).

Almost surely, 2^72215246 is an apocalyptic number.

72215246 is a deficient number, since it is larger than the sum of its proper divisors (36107626).

72215246 is a wasteful number, since it uses less digits than its factorization.

72215246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36107625.

The product of its digits is 6720, while the sum is 29.

The square root of 72215246 is about 8497.9554011539. The cubic root of 72215246 is about 416.4309167357.

The spelling of 72215246 in words is "seventy-two million, two hundred fifteen thousand, two hundred forty-six".