50155121 has 2 divisors, whose sum is σ = 50155122. Its totient is φ = 50155120.

The previous prime is 50155109. The next prime is 50155141. The reversal of 50155121 is 12155105.

It is a happy number.

It is an a-pointer prime, because the next prime (50155141) can be obtained adding 50155121 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49900096 + 255025 = 7064^2 + 505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50155121 is a prime.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 50155121 parts by 10015 straight cuts.

It is a junction number, because it is equal to n+sod(n) for n = 50155093 and 50155102.

It is not a weakly prime, because it can be changed into another prime (50155141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25077560 + 25077561.

It is an arithmetic number, because the mean of its divisors is an integer number (25077561).

Almost surely, 2^50155121 is an apocalyptic number.

It is an amenable number.

50155121 is a deficient number, since it is larger than the sum of its proper divisors (1).

50155121 is an equidigital number, since it uses as much as digits as its factorization.

50155121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 50155121 is about 7082.0280287500. The cubic root of 50155121 is about 368.7837369880.

The spelling of 50155121 in words is "fifty million, one hundred fifty-five thousand, one hundred twenty-one".