3551813 has 2 divisors, whose sum is σ = 3551814. Its totient is φ = 3551812.

The previous prime is 3551797. The next prime is 3551839. The reversal of 3551813 is 3181553.

It is an a-pointer prime, because the next prime (3551839) can be obtained adding 3551813 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3323329 + 228484 = 1823^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 3551813 - 2⁴ = 3551797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3551893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1775906 + 1775907.

It is an arithmetic number, because the mean of its divisors is an integer number (1775907).

Almost surely, 2^3551813 is an apocalyptic number.

It is an amenable number.

3551813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3551813 is an equidigital number, since it uses as much as digits as its factorization.

3551813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 3551813 is about 1884.6254269748. The cubic root of 3551813 is about 152.5749949152.

The spelling of 3551813 in words is "three million, five hundred fifty-one thousand, eight hundred thirteen".