53333381 has 2 divisors, whose sum is σ = 53333382. Its totient is φ = 53333380.

The previous prime is 53333363. The next prime is 53333387. The reversal of 53333381 is 18333335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41396356 + 11937025 = 6434^2 + 3455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53333381 is a prime.

It is a super-2 number, since 2×53333381² = 5688899057782322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53333387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26666690 + 26666691.

It is an arithmetic number, because the mean of its divisors is an integer number (26666691).

Almost surely, 2^53333381 is an apocalyptic number.

It is an amenable number.

53333381 is a deficient number, since it is larger than the sum of its proper divisors (1).

53333381 is an equidigital number, since it uses as much as digits as its factorization.

53333381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 29.

The square root of 53333381 is about 7302.9706969151. The cubic root of 53333381 is about 376.4145236925.

The spelling of 53333381 in words is "fifty-three million, three hundred thirty-three thousand, three hundred eighty-one".