3151450021 has 8 divisors (see below), whose sum is σ = 3337594200. Its totient is φ = 2965390848.

The previous prime is 3151449997. The next prime is 3151450031. The reversal of 3151450021 is 1200541513.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 477422500 + 2674027521 = 21850^2 + 51711^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3151450021 - 2²⁷ = 3017232293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3151449974 and 3151450001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3151450031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65155 + ... + 102703.

It is an arithmetic number, because the mean of its divisors is an integer number (417199275).

Almost surely, 2^3151450021 is an apocalyptic number.

It is an amenable number.

3151450021 is a deficient number, since it is larger than the sum of its proper divisors (186144179).

3151450021 is a wasteful number, since it uses less digits than its factorization.

3151450021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42503.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 3151450021 is about 56137.7771291311. Note that the first 3 decimals coincide. The cubic root of 3151450021 is about 1466.1221036579.

Adding to 3151450021 its reverse (1200541513), we get a palindrome (4351991534).

The spelling of 3151450021 in words is "three billion, one hundred fifty-one million, four hundred fifty thousand, twenty-one".