20151302251 has 2 divisors, whose sum is σ = 20151302252. Its totient is φ = 20151302250.

The previous prime is 20151302243. The next prime is 20151302261. The reversal of 20151302251 is 15220315102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20151302251 - 2³ = 20151302243 is a prime.

It is a super-2 number, since 2×20151302251² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20151302231) 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, 10075651125 + 10075651126.

It is an arithmetic number, because the mean of its divisors is an integer number (10075651126).

Almost surely, 2^20151302251 is an apocalyptic number.

20151302251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20151302251 is an equidigital number, since it uses as much as digits as its factorization.

20151302251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 20151302251 its reverse (15220315102), we get a palindrome (35371617353).

The spelling of 20151302251 in words is "twenty billion, one hundred fifty-one million, three hundred two thousand, two hundred fifty-one".