45148981 has 2 divisors, whose sum is σ = 45148982. Its totient is φ = 45148980.

The previous prime is 45148979. The next prime is 45149003. The reversal of 45148981 is 18984154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41667025 + 3481956 = 6455^2 + 1866^2 .

It is a cyclic number.

It is not a de Polignac number, because 45148981 - 2¹ = 45148979 is a prime.

It is a super-2 number, since 2×45148981² = 4076860970676722, which contains 22 as substring.

Together with 45148979, 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 (45140981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22574490 + 22574491.

It is an arithmetic number, because the mean of its divisors is an integer number (22574491).

Almost surely, 2^45148981 is an apocalyptic number.

It is an amenable number.

45148981 is a deficient number, since it is larger than the sum of its proper divisors (1).

45148981 is an equidigital number, since it uses as much as digits as its factorization.

45148981 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 45148981 is about 6719.2991450002. The cubic root of 45148981 is about 356.0814236387.

The spelling of 45148981 in words is "forty-five million, one hundred forty-eight thousand, nine hundred eighty-one".