52150781 has 8 divisors (see below), whose sum is σ = 56261304. Its totient is φ = 48156160.

The previous prime is 52150771. The next prime is 52150783. The reversal of 52150781 is 18705125.

It can be written as a sum of positive squares in 4 ways, for example, as 6046681 + 46104100 = 2459^2 + 6790^2 .

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 52150781 - 2⁶ = 52150717 is a prime.

It is a super-2 number, since 2×52150781² = 5439407917819922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52150783) 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, 28040 + ... + 29841.

It is an arithmetic number, because the mean of its divisors is an integer number (7032663).

Almost surely, 2^52150781 is an apocalyptic number.

It is an amenable number.

52150781 is a deficient number, since it is larger than the sum of its proper divisors (4110523).

52150781 is a wasteful number, since it uses less digits than its factorization.

52150781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57951.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 52150781 is about 7221.5497644204. The cubic root of 52150781 is about 373.6115314996.

The spelling of 52150781 in words is "fifty-two million, one hundred fifty thousand, seven hundred eighty-one".