1687222052 has 24 divisors (see below), whose sum is σ = 3210823224. Its totient is φ = 772526592.

The previous prime is 1687222049. The next prime is 1687222057. The reversal of 1687222052 is 2502227861.

It can be written as a sum of positive squares in 4 ways, for example, as 616230976 + 1070991076 = 24824^2 + 32726^2 .

It is not an unprimeable number, because it can be changed into a prime (1687222057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332783 + ... + 337814.

It is an arithmetic number, because the mean of its divisors is an integer number (133784301).

Almost surely, 2^1687222052 is an apocalyptic number.

It is an amenable number.

1687222052 is a deficient number, since it is larger than the sum of its proper divisors (1523601172).

1687222052 is a wasteful number, since it uses less digits than its factorization.

1687222052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670655 (or 670653 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1687222052 is about 41075.8085982492. The cubic root of 1687222052 is about 1190.4854202096.

The spelling of 1687222052 in words is "one billion, six hundred eighty-seven million, two hundred twenty-two thousand, fifty-two".