45345981 has 4 divisors (see below), whose sum is σ = 60461312. Its totient is φ = 30230652.

The previous prime is 45345973. The next prime is 45345991. The reversal of 45345981 is 18954354.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 45345981 - 2³ = 45345973 is a prime.

It is a super-2 number, since 2×45345981² = 4112515985704722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45345991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7557661 + ... + 7557666.

It is an arithmetic number, because the mean of its divisors is an integer number (15115328).

Almost surely, 2^45345981 is an apocalyptic number.

It is an amenable number.

45345981 is a deficient number, since it is larger than the sum of its proper divisors (15115331).

45345981 is a wasteful number, since it uses less digits than its factorization.

45345981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15115330.

The product of its digits is 86400, while the sum is 39.

The square root of 45345981 is about 6733.9424559466. The cubic root of 45345981 is about 356.5985727091.

The spelling of 45345981 in words is "forty-five million, three hundred forty-five thousand, nine hundred eighty-one".