3751220081 has 8 divisors (see below), whose sum is σ = 4305510144. Its totient is φ = 3201530400.

The previous prime is 3751220047. The next prime is 3751220087. The reversal of 3751220081 is 1800221573.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3751220081 is a prime.

It is a super-2 number, since 2×3751220081² = 28143304192195293122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3751220087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148345 + ... + 1151606.

It is an arithmetic number, because the mean of its divisors is an integer number (538188768).

Almost surely, 2^3751220081 is an apocalyptic number.

It is an amenable number.

3751220081 is a deficient number, since it is larger than the sum of its proper divisors (554290063).

3751220081 is a wasteful number, since it uses less digits than its factorization.

3751220081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300191.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 3751220081 is about 61247.2046790709. The cubic root of 3751220081 is about 1553.7847269444.

The spelling of 3751220081 in words is "three billion, seven hundred fifty-one million, two hundred twenty thousand, eighty-one".