52191369 has 6 divisors (see below), whose sum is σ = 75387546. Its totient is φ = 34794240.

The previous prime is 52191331. The next prime is 52191421. The reversal of 52191369 is 96319125.

It can be written as a sum of positive squares in only one way, i.e., 50126400 + 2064969 = 7080^2 + 1437^2 .

It is not a de Polignac number, because 52191369 - 2⁹ = 52190857 is a prime.

It is a super-2 number, since 2×52191369² = 5447877996188322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52192369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2899512 + ... + 2899529.

It is an arithmetic number, because the mean of its divisors is an integer number (12564591).

Almost surely, 2^52191369 is an apocalyptic number.

It is an amenable number.

52191369 is a deficient number, since it is larger than the sum of its proper divisors (23196177).

52191369 is a wasteful number, since it uses less digits than its factorization.

52191369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799047 (or 5799044 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 52191369 is about 7224.3594179692. The cubic root of 52191369 is about 373.7084313750.

The spelling of 52191369 in words is "fifty-two million, one hundred ninety-one thousand, three hundred sixty-nine".