45017781 has 8 divisors (see below), whose sum is σ = 60421824. Its totient is φ = 29812800.

The previous prime is 45017761. The next prime is 45017809. The reversal of 45017781 is 18771054.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45017781 - 2⁷ = 45017653 is a prime.

It is a super-2 number, since 2×45017781² = 4053201212327922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45017741) 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, 49236 + ... + 50141.

It is an arithmetic number, because the mean of its divisors is an integer number (7552728).

Almost surely, 2^45017781 is an apocalyptic number.

It is an amenable number.

45017781 is a deficient number, since it is larger than the sum of its proper divisors (15404043).

45017781 is a wasteful number, since it uses less digits than its factorization.

45017781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99531.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 45017781 is about 6709.5291190962. The cubic root of 45017781 is about 355.7361725169.

The spelling of 45017781 in words is "forty-five million, seventeen thousand, seven hundred eighty-one".