48331981 has 2 divisors, whose sum is σ = 48331982. Its totient is φ = 48331980.

The previous prime is 48331973. The next prime is 48332023. The reversal of 48331981 is 18913384.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44756100 + 3575881 = 6690^2 + 1891^2 .

It is a cyclic number.

It is not a de Polignac number, because 48331981 - 2³ = 48331973 is a prime.

It is a super-2 number, since 2×48331981² = 4671960774768722, 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 48331981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48334981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24165990 + 24165991.

It is an arithmetic number, because the mean of its divisors is an integer number (24165991).

Almost surely, 2^48331981 is an apocalyptic number.

It is an amenable number.

48331981 is a deficient number, since it is larger than the sum of its proper divisors (1).

48331981 is an equidigital number, since it uses as much as digits as its factorization.

48331981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 48331981 is about 6952.1206117270. The cubic root of 48331981 is about 364.2600409069.

The spelling of 48331981 in words is "forty-eight million, three hundred thirty-one thousand, nine hundred eighty-one".