2108738251 has 2 divisors, whose sum is σ = 2108738252. Its totient is φ = 2108738250.

The previous prime is 2108738239. The next prime is 2108738267. The reversal of 2108738251 is 1528378012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2108738251 - 2²⁷ = 1974520523 is a prime.

It is a super-2 number, since 2×2108738251² = 8893554022461078002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2108738251.

It is not a weakly prime, because it can be changed into another prime (2108738201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054369125 + 1054369126.

It is an arithmetic number, because the mean of its divisors is an integer number (1054369126).

Almost surely, 2^2108738251 is an apocalyptic number.

2108738251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2108738251 is an equidigital number, since it uses as much as digits as its factorization.

2108738251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 2108738251 is about 45921.0001088826. Note that the first 3 decimals coincide. The cubic root of 2108738251 is about 1282.3529010384.

The spelling of 2108738251 in words is "two billion, one hundred eight million, seven hundred thirty-eight thousand, two hundred fifty-one".