52787381 has 2 divisors, whose sum is σ = 52787382. Its totient is φ = 52787380.

The previous prime is 52787341. The next prime is 52787393. The reversal of 52787381 is 18378725.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52200625 + 586756 = 7225^2 + 766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52787381 is a prime.

It is a super-2 number, since 2×52787381² = 5573015185678322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52787321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26393690 + 26393691.

It is an arithmetic number, because the mean of its divisors is an integer number (26393691).

Almost surely, 2^52787381 is an apocalyptic number.

It is an amenable number.

52787381 is a deficient number, since it is larger than the sum of its proper divisors (1).

52787381 is an equidigital number, since it uses as much as digits as its factorization.

52787381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 41.

The square root of 52787381 is about 7265.4924815872. The cubic root of 52787381 is about 375.1256017783.

The spelling of 52787381 in words is "fifty-two million, seven hundred eighty-seven thousand, three hundred eighty-one".