3551061321 has 24 divisors (see below), whose sum is σ = 5232629376. Its totient is φ = 2319801120.

The previous prime is 3551061317. The next prime is 3551061331. The reversal of 3551061321 is 1231601553.

3551061321 is a `hidden beast` number, since 35 + 5 + 10 + 613 + 2 + 1 = 666.

3551061321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3551061321 - 2² = 3551061317 is a prime.

It is a super-2 number, since 2×3551061321² = 25220073011004530082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3551061301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 416976 + ... + 425406.

It is an arithmetic number, because the mean of its divisors is an integer number (218026224).

Almost surely, 2^3551061321 is an apocalyptic number.

It is an amenable number.

3551061321 is a deficient number, since it is larger than the sum of its proper divisors (1681568055).

3551061321 is a wasteful number, since it uses less digits than its factorization.

3551061321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9373 (or 9370 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 3551061321 is about 59590.7821814750. The cubic root of 3551061321 is about 1525.6423088088.

Adding to 3551061321 its reverse (1231601553), we get a palindrome (4782662874).

The spelling of 3551061321 in words is "three billion, five hundred fifty-one million, sixty-one thousand, three hundred twenty-one".