3221150981 has 2 divisors, whose sum is σ = 3221150982. Its totient is φ = 3221150980.

The previous prime is 3221150963. The next prime is 3221151049. The reversal of 3221150981 is 1890511223.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3025990081 + 195160900 = 55009^2 + 13970^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221150981 - 2¹⁸ = 3220888837 is a prime.

It is a super-2 number, since 2×3221150981² = 20751627284794524722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3221150381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610575490 + 1610575491.

It is an arithmetic number, because the mean of its divisors is an integer number (1610575491).

Almost surely, 2^3221150981 is an apocalyptic number.

It is an amenable number.

3221150981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221150981 is an equidigital number, since it uses as much as digits as its factorization.

3221150981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 3221150981 is about 56755.1846177951. The cubic root of 3221150981 is about 1476.8521757258.

The spelling of 3221150981 in words is "three billion, two hundred twenty-one million, one hundred fifty thousand, nine hundred eighty-one".