537107521 has 8 divisors (see below), whose sum is σ = 555967080. Its totient is φ = 518270592.

The previous prime is 537107513. The next prime is 537107531. The reversal of 537107521 is 125701735.

It can be written as a sum of positive squares in 4 ways, for example, as 38925121 + 498182400 = 6239^2 + 22320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 537107521 - 2³ = 537107513 is a prime.

It is a super-2 number, since 2×537107521² = 576968978229530882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537107531) 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, 53151 + ... + 62443.

It is an arithmetic number, because the mean of its divisors is an integer number (69495885).

Almost surely, 2^537107521 is an apocalyptic number.

It is an amenable number.

537107521 is a deficient number, since it is larger than the sum of its proper divisors (18859559).

537107521 is a wasteful number, since it uses less digits than its factorization.

537107521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11315.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 537107521 is about 23175.5802732100. The cubic root of 537107521 is about 812.8687189903.

The spelling of 537107521 in words is "five hundred thirty-seven million, one hundred seven thousand, five hundred twenty-one".