52173781 has 8 divisors (see below), whose sum is σ = 57125664. Its totient is φ = 47256720.

The previous prime is 52173767. The next prime is 52173787. The reversal of 52173781 is 18737125.

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 52173781 - 2¹¹ = 52171733 is a prime.

It is a super-2 number, since 2×52173781² = 5444206847671922, 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 (52173787) 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, 5515 + ... + 11608.

It is an arithmetic number, because the mean of its divisors is an integer number (7140708).

Almost surely, 2^52173781 is an apocalyptic number.

It is an amenable number.

52173781 is a deficient number, since it is larger than the sum of its proper divisors (4951883).

52173781 is a wasteful number, since it uses less digits than its factorization.

52173781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17411.

The product of its digits is 11760, while the sum is 34.

The square root of 52173781 is about 7223.1420448445. The cubic root of 52173781 is about 373.6664479176. Note that the first 3 decimals are identical.

It can be divided in two parts, 5217 and 3781, that added together give a palindrome (8998).

The spelling of 52173781 in words is "fifty-two million, one hundred seventy-three thousand, seven hundred eighty-one".