1013400251 has 2 divisors, whose sum is σ = 1013400252. Its totient is φ = 1013400250.

The previous prime is 1013400247. The next prime is 1013400281. The reversal of 1013400251 is 1520043101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1013400251 - 2² = 1013400247 is a prime.

It is not a weakly prime, because it can be changed into another prime (1013400281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506700125 + 506700126.

It is an arithmetic number, because the mean of its divisors is an integer number (506700126).

Almost surely, 2^1013400251 is an apocalyptic number.

1013400251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013400251 is an equidigital number, since it uses as much as digits as its factorization.

1013400251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1013400251 is about 31833.9480900500. The cubic root of 1013400251 is about 1004.4469456941.

Adding to 1013400251 its reverse (1520043101), we get a palindrome (2533443352).

The spelling of 1013400251 in words is "one billion, thirteen million, four hundred thousand, two hundred fifty-one".