50113981 has 2 divisors, whose sum is σ = 50113982. Its totient is φ = 50113980.

The previous prime is 50113979. The next prime is 50113993. The reversal of 50113981 is 18931105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 1602756 = 6965^2 + 1266^2 .

It is a cyclic number.

It is not a de Polignac number, because 50113981 - 2¹ = 50113979 is a prime.

It is a super-2 number, since 2×50113981² = 5022822183336722, which contains 22 as substring.

Together with 50113979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50113901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25056990 + 25056991.

It is an arithmetic number, because the mean of its divisors is an integer number (25056991).

Almost surely, 2^50113981 is an apocalyptic number.

It is an amenable number.

50113981 is a deficient number, since it is larger than the sum of its proper divisors (1).

50113981 is an equidigital number, since it uses as much as digits as its factorization.

50113981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 50113981 is about 7079.1228976477. The cubic root of 50113981 is about 368.6828771438.

The spelling of 50113981 in words is "fifty million, one hundred thirteen thousand, nine hundred eighty-one".