1901200331 has 2 divisors, whose sum is σ = 1901200332. Its totient is φ = 1901200330.

The previous prime is 1901200313. The next prime is 1901200339. The reversal of 1901200331 is 1330021091.

Together with previous prime (1901200313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1901200331 is a prime.

It is a super-2 number, since 2×1901200331² = 7229125397189019122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1901200339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950600165 + 950600166.

It is an arithmetic number, because the mean of its divisors is an integer number (950600166).

Almost surely, 2^1901200331 is an apocalyptic number.

1901200331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901200331 is an equidigital number, since it uses as much as digits as its factorization.

1901200331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1901200331 is about 43602.7560023446. The cubic root of 1901200331 is about 1238.8230966121.

The spelling of 1901200331 in words is "one billion, nine hundred one million, two hundred thousand, three hundred thirty-one".