52501861 has 4 divisors (see below), whose sum is σ = 54312300. Its totient is φ = 50691424.

The previous prime is 52501859. The next prime is 52501903. The reversal of 52501861 is 16810525.

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 33709636 + 18792225 = 5806^2 + 4335^2 .

It is a cyclic number.

It is not a de Polignac number, because 52501861 - 2¹ = 52501859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52504861) 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, 905176 + ... + 905233.

It is an arithmetic number, because the mean of its divisors is an integer number (13578075).

Almost surely, 2^52501861 is an apocalyptic number.

It is an amenable number.

52501861 is a deficient number, since it is larger than the sum of its proper divisors (1810439).

52501861 is a wasteful number, since it uses less digits than its factorization.

52501861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810438.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 52501861 is about 7245.8167931573. The cubic root of 52501861 is about 374.4480436869.

The spelling of 52501861 in words is "fifty-two million, five hundred one thousand, eight hundred sixty-one".