3402256221 has 48 divisors (see below), whose sum is σ = 6071170560. Its totient is φ = 1787857920.

The previous prime is 3402256201. The next prime is 3402256243. The reversal of 3402256221 is 1226522043.

It is a happy number.

3402256221 is a `hidden beast` number, since 3 + 402 + 256 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 3402256221 - 2¹¹ = 3402254173 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3402256201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214285 + ... + 229613.

It is an arithmetic number, because the mean of its divisors is an integer number (126482720).

Almost surely, 2^3402256221 is an apocalyptic number.

It is an amenable number.

3402256221 is a deficient number, since it is larger than the sum of its proper divisors (2668914339).

3402256221 is a wasteful number, since it uses less digits than its factorization.

3402256221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15626 (or 15623 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 3402256221 is about 58328.8626753514. The cubic root of 3402256221 is about 1504.0271371021.

Adding to 3402256221 its reverse (1226522043), we get a palindrome (4628778264).

The spelling of 3402256221 in words is "three billion, four hundred two million, two hundred fifty-six thousand, two hundred twenty-one".