772172222 has 4 divisors (see below), whose sum is σ = 1158258336. Its totient is φ = 386086110.

The previous prime is 772172213. The next prime is 772172227. The reversal of 772172222 is 222271277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222271277 = 17 ⋅13074781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772172227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193043054 + ... + 193043057.

It is an arithmetic number, because the mean of its divisors is an integer number (289564584).

Almost surely, 2^772172222 is an apocalyptic number.

772172222 is a deficient number, since it is larger than the sum of its proper divisors (386086114).

772172222 is a wasteful number, since it uses less digits than its factorization.

772172222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386086113.

The product of its digits is 10976, while the sum is 32.

The square root of 772172222 is about 27787.9870087777. The cubic root of 772172222 is about 917.4267340714.

The spelling of 772172222 in words is "seven hundred seventy-two million, one hundred seventy-two thousand, two hundred twenty-two".