3557381 has 2 divisors, whose sum is σ = 3557382. Its totient is φ = 3557380.

The previous prime is 3557377. The next prime is 3557431. The reversal of 3557381 is 1837553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3389281 + 168100 = 1841^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 3557381 - 2² = 3557377 is a prime.

It is a super-2 number, since 2×3557381² = 25309919158322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3557681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1778690 + 1778691.

It is an arithmetic number, because the mean of its divisors is an integer number (1778691).

Almost surely, 2^3557381 is an apocalyptic number.

It is an amenable number.

3557381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3557381 is an equidigital number, since it uses as much as digits as its factorization.

3557381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 3557381 is about 1886.1020651068. The cubic root of 3557381 is about 152.6546813582.

The spelling of 3557381 in words is "three million, five hundred fifty-seven thousand, three hundred eighty-one".