49191481 has 2 divisors, whose sum is σ = 49191482. Its totient is φ = 49191480.

The previous prime is 49191419. The next prime is 49191487. The reversal of 49191481 is 18419194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44675856 + 4515625 = 6684^2 + 2125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49191481 is a prime.

It is a super-2 number, since 2×49191481² = 4839603605946722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49191481.

It is not a weakly prime, because it can be changed into another prime (49191487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24595740 + 24595741.

It is an arithmetic number, because the mean of its divisors is an integer number (24595741).

Almost surely, 2^49191481 is an apocalyptic number.

It is an amenable number.

49191481 is a deficient number, since it is larger than the sum of its proper divisors (1).

49191481 is an equidigital number, since it uses as much as digits as its factorization.

49191481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 49191481 is about 7013.6638784590. The cubic root of 49191481 is about 366.4066096303.

It can be divided in two parts, 4919 and 1481, that added together give a square (6400 = 80²).

The spelling of 49191481 in words is "forty-nine million, one hundred ninety-one thousand, four hundred eighty-one".