525172349 has 4 divisors (see below), whose sum is σ = 565570236. Its totient is φ = 484774464.

The previous prime is 525172337. The next prime is 525172411. The reversal of 525172349 is 943271525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142969849 + 382202500 = 11957^2 + 19550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525172349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525172309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20198924 + ... + 20198949.

It is an arithmetic number, because the mean of its divisors is an integer number (141392559).

Almost surely, 2^525172349 is an apocalyptic number.

It is an amenable number.

525172349 is a deficient number, since it is larger than the sum of its proper divisors (40397887).

525172349 is a wasteful number, since it uses less digits than its factorization.

525172349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40397886.

The product of its digits is 75600, while the sum is 38.

The square root of 525172349 is about 22916.6391296804. The cubic root of 525172349 is about 806.8025904378.

The spelling of 525172349 in words is "five hundred twenty-five million, one hundred seventy-two thousand, three hundred forty-nine".