43103240251 has 2 divisors, whose sum is σ = 43103240252. Its totient is φ = 43103240250.

The previous prime is 43103240249. The next prime is 43103240273. The reversal of 43103240251 is 15204230134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43103240251 - 2¹ = 43103240249 is a prime.

Together with 43103240249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43103240221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21551620125 + 21551620126.

It is an arithmetic number, because the mean of its divisors is an integer number (21551620126).

Almost surely, 2^43103240251 is an apocalyptic number.

43103240251 is a deficient number, since it is larger than the sum of its proper divisors (1).

43103240251 is an equidigital number, since it uses as much as digits as its factorization.

43103240251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 43103240251 its reverse (15204230134), we get a palindrome (58307470385).

The spelling of 43103240251 in words is "forty-three billion, one hundred three million, two hundred forty thousand, two hundred fifty-one".