3551481563 has 4 divisors (see below), whose sum is σ = 4058836080. Its totient is φ = 3044127048.

The previous prime is 3551481547. The next prime is 3551481581. The reversal of 3551481563 is 3651841553.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3551481563 - 2⁴ = 3551481547 is a prime.

It is a super-2 number, since 2×3551481563² = 25226042584657845938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3551481563.

It is not an unprimeable number, because it can be changed into a prime (3551481503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253677248 + ... + 253677261.

It is an arithmetic number, because the mean of its divisors is an integer number (1014709020).

Almost surely, 2^3551481563 is an apocalyptic number.

3551481563 is a deficient number, since it is larger than the sum of its proper divisors (507354517).

3551481563 is an equidigital number, since it uses as much as digits as its factorization.

3551481563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507354516.

The product of its digits is 216000, while the sum is 41.

The square root of 3551481563 is about 59594.3081426406. The cubic root of 3551481563 is about 1525.7024892851.

The spelling of 3551481563 in words is "three billion, five hundred fifty-one million, four hundred eighty-one thousand, five hundred sixty-three".