53145581 has 2 divisors, whose sum is σ = 53145582. Its totient is φ = 53145580.

The previous prime is 53145577. The next prime is 53145593. The reversal of 53145581 is 18554135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52852900 + 292681 = 7270^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 53145581 - 2² = 53145577 is a prime.

It is a super-2 number, since 2×53145581² = 5648905559655122, 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 (53145181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26572790 + 26572791.

It is an arithmetic number, because the mean of its divisors is an integer number (26572791).

Almost surely, 2^53145581 is an apocalyptic number.

It is an amenable number.

53145581 is a deficient number, since it is larger than the sum of its proper divisors (1).

53145581 is an equidigital number, since it uses as much as digits as its factorization.

53145581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 32.

The square root of 53145581 is about 7290.1015767958. The cubic root of 53145581 is about 375.9721879421.

The spelling of 53145581 in words is "fifty-three million, one hundred forty-five thousand, five hundred eighty-one".