3211428981 has 16 divisors (see below), whose sum is σ = 4487273856. Its totient is φ = 2039068416.

The previous prime is 3211428977. The next prime is 3211428989. The reversal of 3211428981 is 1898241123.

It is not a de Polignac number, because 3211428981 - 2² = 3211428977 is a prime.

It is a super-2 number, since 2×3211428981² = 20626552200013396722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3211428989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83800 + ... + 115953.

It is an arithmetic number, because the mean of its divisors is an integer number (280454616).

Almost surely, 2^3211428981 is an apocalyptic number.

It is an amenable number.

3211428981 is a deficient number, since it is larger than the sum of its proper divisors (1275844875).

3211428981 is a wasteful number, since it uses less digits than its factorization.

3211428981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200012.

The product of its digits is 27648, while the sum is 39.

The square root of 3211428981 is about 56669.4713315732. The cubic root of 3211428981 is about 1475.3648785710.

The spelling of 3211428981 in words is "three billion, two hundred eleven million, four hundred twenty-eight thousand, nine hundred eighty-one".