3557225781 has 32 divisors (see below), whose sum is σ = 5343408000. Its totient is φ = 2338579584.

The previous prime is 3557225767. The next prime is 3557225801. The reversal of 3557225781 is 1875227553.

3557225781 is a `hidden beast` number, since 3 + 5 + 5 + 72 + 2 + 578 + 1 = 666.

3557225781 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 3557225781 - 2⁶ = 3557225717 is a prime.

It is a super-2 number, since 2×3557225781² = 25307710514022119922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3557225381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1005091 + ... + 1008623.

It is an arithmetic number, because the mean of its divisors is an integer number (166981500).

Almost surely, 2^3557225781 is an apocalyptic number.

It is an amenable number.

3557225781 is a deficient number, since it is larger than the sum of its proper divisors (1786182219).

3557225781 is a wasteful number, since it uses less digits than its factorization.

3557225781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050 (or 4044 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 3557225781 is about 59642.4830217522. The cubic root of 3557225781 is about 1526.5246106822.

The spelling of 3557225781 in words is "three billion, five hundred fifty-seven million, two hundred twenty-five thousand, seven hundred eighty-one".