53011381 has 2 divisors, whose sum is σ = 53011382. Its totient is φ = 53011380.

The previous prime is 53011367. The next prime is 53011393. The reversal of 53011381 is 18311035.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52330756 + 680625 = 7234^2 + 825^2 .

It is a cyclic number.

It is not a de Polignac number, because 53011381 - 2¹³ = 53003189 is a prime.

It is a super-2 number, since 2×53011381² = 5620413031054322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53011081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26505690 + 26505691.

It is an arithmetic number, because the mean of its divisors is an integer number (26505691).

Almost surely, 2^53011381 is an apocalyptic number.

It is an amenable number.

53011381 is a deficient number, since it is larger than the sum of its proper divisors (1).

53011381 is an equidigital number, since it uses as much as digits as its factorization.

53011381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 53011381 is about 7280.8914976121. The cubic root of 53011381 is about 375.6554604715.

It can be divided in two parts, 530 and 11381, that added together give a palindrome (11911).

The spelling of 53011381 in words is "fifty-three million, eleven thousand, three hundred eighty-one".