652212781 has 8 divisors (see below), whose sum is σ = 711698400. Its totient is φ = 592759440.

The previous prime is 652212761. The next prime is 652212797. The reversal of 652212781 is 187212256.

It is a happy number.

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 652212781 - 2⁹ = 652212269 is a prime.

It is a super-2 number, since 2×652212781² = 850763023399507922, 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 (652212761) 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, 57130 + ... + 67588.

It is an arithmetic number, because the mean of its divisors is an integer number (88962300).

Almost surely, 2^652212781 is an apocalyptic number.

It is an amenable number.

652212781 is a deficient number, since it is larger than the sum of its proper divisors (59485619).

652212781 is a wasteful number, since it uses less digits than its factorization.

652212781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16139.

The product of its digits is 13440, while the sum is 34.

The square root of 652212781 is about 25538.4569032665. The cubic root of 652212781 is about 867.2209650507.

The spelling of 652212781 in words is "six hundred fifty-two million, two hundred twelve thousand, seven hundred eighty-one".