72772022 has 4 divisors (see below), whose sum is σ = 109158036. Its totient is φ = 36386010.

The previous prime is 72772013. The next prime is 72772031. The reversal of 72772022 is 22027727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22027727 = 257 ⋅85711.

It is an interprime number because it is at equal distance from previous prime (72772013) and next prime (72772031).

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, 18193004 + ... + 18193007.

It is an arithmetic number, because the mean of its divisors is an integer number (27289509).

Almost surely, 2^72772022 is an apocalyptic number.

72772022 is a deficient number, since it is larger than the sum of its proper divisors (36386014).

72772022 is a wasteful number, since it uses less digits than its factorization.

72772022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36386013.

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 72772022 is about 8530.6519094381. The cubic root of 72772022 is about 417.4983986457.

Adding to 72772022 its reverse (22027727), we get a palindrome (94799749).

The spelling of 72772022 in words is "seventy-two million, seven hundred seventy-two thousand, twenty-two".