2031715421 has 2 divisors, whose sum is σ = 2031715422. Its totient is φ = 2031715420.

The previous prime is 2031715381. The next prime is 2031715447. The reversal of 2031715421 is 1245171302.

It is an a-pointer prime, because the next prime (2031715447) can be obtained adding 2031715421 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108224100 + 923491321 = 33290^2 + 30389^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031715421 - 2¹⁴ = 2031699037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031715451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015857710 + 1015857711.

It is an arithmetic number, because the mean of its divisors is an integer number (1015857711).

Almost surely, 2^2031715421 is an apocalyptic number.

It is an amenable number.

2031715421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031715421 is an equidigital number, since it uses as much as digits as its factorization.

2031715421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2031715421 is about 45074.5540299624. The cubic root of 2031715421 is about 1266.5459747039.

Adding to 2031715421 its reverse (1245171302), we get a palindrome (3276886723).

The spelling of 2031715421 in words is "two billion, thirty-one million, seven hundred fifteen thousand, four hundred twenty-one".