53311381 has 2 divisors, whose sum is σ = 53311382. Its totient is φ = 53311380.

The previous prime is 53311373. The next prime is 53311387. The reversal of 53311381 is 18311335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53144100 + 167281 = 7290^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 53311381 - 2³ = 53311373 is a prime.

It is a super-2 number, since 2×53311381² = 5684206688254322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53311387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26655690 + 26655691.

It is an arithmetic number, because the mean of its divisors is an integer number (26655691).

Almost surely, 2^53311381 is an apocalyptic number.

It is an amenable number.

53311381 is a deficient number, since it is larger than the sum of its proper divisors (1).

53311381 is an equidigital number, since it uses as much as digits as its factorization.

53311381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 25.

The square root of 53311381 is about 7301.4643051925. The cubic root of 53311381 is about 376.3627596235.

The spelling of 53311381 in words is "fifty-three million, three hundred eleven thousand, three hundred eighty-one".