2081903251 has 4 divisors (see below), whose sum is σ = 2111225904. Its totient is φ = 2052580600.

The previous prime is 2081903237. The next prime is 2081903267. The reversal of 2081903251 is 1523091802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2081903251 is a prime.

It is a super-2 number, since 2×2081903251² = 8668642293048738002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081903281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14661220 + ... + 14661361.

It is an arithmetic number, because the mean of its divisors is an integer number (527806476).

Almost surely, 2^2081903251 is an apocalyptic number.

2081903251 is a deficient number, since it is larger than the sum of its proper divisors (29322653).

2081903251 is an equidigital number, since it uses as much as digits as its factorization.

2081903251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29322652.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2081903251 is about 45627.8780023792. The cubic root of 2081903251 is about 1276.8900842746.

The spelling of 2081903251 in words is "two billion, eighty-one million, nine hundred three thousand, two hundred fifty-one".