52121501 has 4 divisors (see below), whose sum is σ = 52139100. Its totient is φ = 52103904.

The previous prime is 52121479. The next prime is 52121521. The reversal of 52121501 is 10512125.

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 25351225 + 26770276 = 5035^2 + 5174^2 .

It is a cyclic number.

It is not a de Polignac number, because 52121501 - 2⁶ = 52121437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 52121501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52121521) 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, 3146 + ... + 10683.

It is an arithmetic number, because the mean of its divisors is an integer number (13034775).

Almost surely, 2^52121501 is an apocalyptic number.

It is an amenable number.

52121501 is a deficient number, since it is larger than the sum of its proper divisors (17599).

52121501 is a wasteful number, since it uses less digits than its factorization.

52121501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17598.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 52121501 is about 7219.5222141081. The cubic root of 52121501 is about 373.5415971453.

Adding to 52121501 its reverse (10512125), we get a palindrome (62633626).

It can be divided in two parts, 521 and 21501, that added together give a palindrome (22022).

The spelling of 52121501 in words is "fifty-two million, one hundred twenty-one thousand, five hundred one".