77013222 has 32 divisors (see below), whose sum is σ = 180956160. Its totient is φ = 21541920.

The previous prime is 77013221. The next prime is 77013239. The reversal of 77013222 is 22231077.

77013222 = 149² + 150² + ... + 616².

It is a junction number, because it is equal to n+sod(n) for n = 77013192 and 77013201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77013221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44022 + ... + 45737.

It is an arithmetic number, because the mean of its divisors is an integer number (5654880).

Almost surely, 2^77013222 is an apocalyptic number.

77013222 is an abundant number, since it is smaller than the sum of its proper divisors (103942938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77013222 is a wasteful number, since it uses less digits than its factorization.

77013222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89788.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 77013222 is about 8775.7177484238. The cubic root of 77013222 is about 425.4564360401.

Adding to 77013222 its reverse (22231077), we get a palindrome (99244299).

The spelling of 77013222 in words is "seventy-seven million, thirteen thousand, two hundred twenty-two".