251030047 has 2 divisors, whose sum is σ = 251030048. Its totient is φ = 251030046.

The previous prime is 251029979. The next prime is 251030051. The reversal of 251030047 is 740030152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251030047 - 2¹¹ = 251027999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251030057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125515023 + 125515024.

It is an arithmetic number, because the mean of its divisors is an integer number (125515024).

Almost surely, 2^251030047 is an apocalyptic number.

251030047 is a deficient number, since it is larger than the sum of its proper divisors (1).

251030047 is an equidigital number, since it uses as much as digits as its factorization.

251030047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 251030047 is about 15843.9277642888. The cubic root of 251030047 is about 630.8245246830.

Adding to 251030047 its reverse (740030152), we get a palindrome (991060199).

The spelling of 251030047 in words is "two hundred fifty-one million, thirty thousand, forty-seven".