49458181 has 2 divisors, whose sum is σ = 49458182. Its totient is φ = 49458180.

The previous prime is 49458173. The next prime is 49458191. The reversal of 49458181 is 18185494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31472100 + 17986081 = 5610^2 + 4241^2 .

It is a cyclic number.

It is not a de Polignac number, because 49458181 - 2³ = 49458173 is a prime.

It is a super-2 number, since 2×49458181² = 4892223335657522, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49458131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24729090 + 24729091.

It is an arithmetic number, because the mean of its divisors is an integer number (24729091).

Almost surely, 2^49458181 is an apocalyptic number.

It is an amenable number.

49458181 is a deficient number, since it is larger than the sum of its proper divisors (1).

49458181 is an equidigital number, since it uses as much as digits as its factorization.

49458181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 40.

The square root of 49458181 is about 7032.6510648546. The cubic root of 49458181 is about 367.0675951491.

The spelling of 49458181 in words is "forty-nine million, four hundred fifty-eight thousand, one hundred eighty-one".