771221022 has 48 divisors (see below), whose sum is σ = 1822082688. Its totient is φ = 215723040.

The previous prime is 771220969. The next prime is 771221023. The reversal of 771221022 is 220122177.

It is a junction number, because it is equal to n+sod(n) for n = 771220983 and 771221001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771221023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23418 + ... + 45725.

It is an arithmetic number, because the mean of its divisors is an integer number (37960056).

Almost surely, 2^771221022 is an apocalyptic number.

771221022 is an abundant number, since it is smaller than the sum of its proper divisors (1050861666).

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

771221022 is a wasteful number, since it uses less digits than its factorization.

771221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69185 (or 69172 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 771221022 is about 27770.8664250866. The cubic root of 771221022 is about 917.0498687137.

Adding to 771221022 its reverse (220122177), we get a palindrome (991343199).

The spelling of 771221022 in words is "seven hundred seventy-one million, two hundred twenty-one thousand, twenty-two".