3551421243 has 16 divisors (see below), whose sum is σ = 4764393216. Its totient is φ = 2353058400.

The previous prime is 3551421239. The next prime is 3551421277. The reversal of 3551421243 is 3421241553.

It is not a de Polignac number, because 3551421243 - 2² = 3551421239 is a prime.

It is a super-2 number, since 2×3551421243² = 25225185690463330098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3551421243.

It is not an unprimeable number, because it can be changed into a prime (3551421443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661018 + ... + 666368.

It is an arithmetic number, because the mean of its divisors is an integer number (297774576).

Almost surely, 2^3551421243 is an apocalyptic number.

3551421243 is a deficient number, since it is larger than the sum of its proper divisors (1212971973).

3551421243 is a wasteful number, since it uses less digits than its factorization.

3551421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674.

The product of its digits is 14400, while the sum is 30.

The square root of 3551421243 is about 59593.8020518913. The cubic root of 3551421243 is about 1525.6938514914.

Adding to 3551421243 its reverse (3421241553), we get a palindrome (6972662796).

The spelling of 3551421243 in words is "three billion, five hundred fifty-one million, four hundred twenty-one thousand, two hundred forty-three".