50121431 has 2 divisors, whose sum is σ = 50121432. Its totient is φ = 50121430.

The previous prime is 50121419. The next prime is 50121433. The reversal of 50121431 is 13412105.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50121431 is a prime.

It is a super-2 number, since 2×50121431² = 5024315690975522, which contains 22 as substring.

Together with 50121433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50121433) 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, 25060715 + 25060716.

It is an arithmetic number, because the mean of its divisors is an integer number (25060716).

Almost surely, 2^50121431 is an apocalyptic number.

50121431 is a deficient number, since it is larger than the sum of its proper divisors (1).

50121431 is an equidigital number, since it uses as much as digits as its factorization.

50121431 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 50121431 is about 7079.6490732239. The cubic root of 50121431 is about 368.7011458404.

Adding to 50121431 its reverse (13412105), we get a palindrome (63533536).

The spelling of 50121431 in words is "fifty million, one hundred twenty-one thousand, four hundred thirty-one".