915222241 has 4 divisors (see below), whose sum is σ = 917938372. Its totient is φ = 912506112.

The previous prime is 915222239. The next prime is 915222247. The reversal of 915222241 is 142222519.

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

It can be written as a sum of positive squares in 2 ways, for example, as 131446225 + 783776016 = 11465^2 + 27996^2 .

It is a cyclic number.

It is not a de Polignac number, because 915222241 - 2¹ = 915222239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (915222247) 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, 1357560 + ... + 1358233.

It is an arithmetic number, because the mean of its divisors is an integer number (229484593).

Almost surely, 2^915222241 is an apocalyptic number.

It is an amenable number.

915222241 is a deficient number, since it is larger than the sum of its proper divisors (2716131).

915222241 is a wasteful number, since it uses less digits than its factorization.

915222241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716130.

The product of its digits is 2880, while the sum is 28.

The square root of 915222241 is about 30252.6402318872. The cubic root of 915222241 is about 970.9022819278.

The spelling of 915222241 in words is "nine hundred fifteen million, two hundred twenty-two thousand, two hundred forty-one".