52561501 has 4 divisors (see below), whose sum is σ = 55653372. Its totient is φ = 49469632.

The previous prime is 52561499. The next prime is 52561517. The reversal of 52561501 is 10516525.

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 18619225 + 33942276 = 4315^2 + 5826^2 .

It is a cyclic number.

It is not a de Polignac number, because 52561501 - 2¹ = 52561499 is a prime.

It is a super-2 number, since 2×52561501² = 5525422774746002, 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 (52561541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1545910 + ... + 1545943.

It is an arithmetic number, because the mean of its divisors is an integer number (13913343).

Almost surely, 2^52561501 is an apocalyptic number.

It is an amenable number.

52561501 is a deficient number, since it is larger than the sum of its proper divisors (3091871).

52561501 is a wasteful number, since it uses less digits than its factorization.

52561501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091870.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 52561501 is about 7249.9311031209. The cubic root of 52561501 is about 374.5897759996.

It can be divided in two parts, 525 and 61501, that added together give a palindrome (62026).

The spelling of 52561501 in words is "fifty-two million, five hundred sixty-one thousand, five hundred one".