13545557 has 2 divisors, whose sum is σ = 13545558. Its totient is φ = 13545556.

The previous prime is 13545547. The next prime is 13545619. The reversal of 13545557 is 75554531.

13545557 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11930116 + 1615441 = 3454^2 + 1271^2 .

It is a cyclic number.

It is not a de Polignac number, because 13545557 - 2¹² = 13541461 is a prime.

It is a super-2 number, since 2×13545557² = 366964228880498, 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 (13545527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6772778 + 6772779.

It is an arithmetic number, because the mean of its divisors is an integer number (6772779).

Almost surely, 2^13545557 is an apocalyptic number.

It is an amenable number.

13545557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13545557 is an equidigital number, since it uses as much as digits as its factorization.

13545557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52500, while the sum is 35.

The square root of 13545557 is about 3680.4289152217. The cubic root of 13545557 is about 238.3776986650.

The spelling of 13545557 in words is "thirteen million, five hundred forty-five thousand, five hundred fifty-seven".