48051981 has 8 divisors (see below), whose sum is σ = 71188160. Its totient is φ = 32034636.

The previous prime is 48051967. The next prime is 48052051. The reversal of 48051981 is 18915084.

It is not a de Polignac number, because 48051981 - 2⁶ = 48051917 is a prime.

It is a super-2 number, since 2×48051981² = 4617985756048722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48052981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889825 + ... + 889878.

It is an arithmetic number, because the mean of its divisors is an integer number (8898520).

Almost surely, 2^48051981 is an apocalyptic number.

It is an amenable number.

48051981 is a deficient number, since it is larger than the sum of its proper divisors (23136179).

48051981 is a wasteful number, since it uses less digits than its factorization.

48051981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779712 (or 1779706 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 48051981 is about 6931.9536207335. The cubic root of 48051981 is about 363.5552597740. Note that the first 3 decimals are identical.

It can be divided in two parts, 4805 and 1981, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 48051981 in words is "forty-eight million, fifty-one thousand, nine hundred eighty-one".