52981669 has 18 divisors (see below), whose sum is σ = 59220630. Its totient is φ = 47376576.

The previous prime is 52981667. The next prime is 52981679. The reversal of 52981669 is 96618925.

It can be written as a sum of positive squares in 9 ways, for example, as 245025 + 52736644 = 495^2 + 7262^2 .

It is not a de Polignac number, because 52981669 - 2¹ = 52981667 is a prime.

It is a super-2 number, since 2×52981669² = 5614114500051122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52981661) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 231247 + ... + 231475.

It is an arithmetic number, because the mean of its divisors is an integer number (3290035).

Almost surely, 2^52981669 is an apocalyptic number.

It is an amenable number.

52981669 is a deficient number, since it is larger than the sum of its proper divisors (6238961).

52981669 is a wasteful number, since it uses less digits than its factorization.

52981669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 279 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The square root of 52981669 is about 7278.8508021528. The cubic root of 52981669 is about 375.5852644698.

The spelling of 52981669 in words is "fifty-two million, nine hundred eighty-one thousand, six hundred sixty-nine".