52193081 has 4 divisors (see below), whose sum is σ = 52731252. Its totient is φ = 51654912.

The previous prime is 52193047. The next prime is 52193101. The reversal of 52193081 is 18039125.

52193081 = 685² + 686² + ... + 781².

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 42055225 + 10137856 = 6485^2 + 3184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52193081 is a prime.

It is a super-2 number, since 2×52193081² = 5448235408545122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52193021) 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, 268940 + ... + 269133.

It is an arithmetic number, because the mean of its divisors is an integer number (13182813).

Almost surely, 2^52193081 is an apocalyptic number.

It is an amenable number.

52193081 is a deficient number, since it is larger than the sum of its proper divisors (538171).

52193081 is an equidigital number, since it uses as much as digits as its factorization.

52193081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538170.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 52193081 is about 7224.4779050115. The cubic root of 52193081 is about 373.7125175030.

The spelling of 52193081 in words is "fifty-two million, one hundred ninety-three thousand, eighty-one".