45143781 has 8 divisors (see below), whose sum is σ = 62133504. Its totient is φ = 29124960.

The previous prime is 45143773. The next prime is 45143797. The reversal of 45143781 is 18734154.

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

It is not a de Polignac number, because 45143781 - 2³ = 45143773 is a prime.

It is a super-2 number, since 2×45143781² = 4075921925951922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45143701) 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, 242616 + ... + 242801.

It is an arithmetic number, because the mean of its divisors is an integer number (7766688).

Almost surely, 2^45143781 is an apocalyptic number.

It is an amenable number.

45143781 is a deficient number, since it is larger than the sum of its proper divisors (16989723).

45143781 is a wasteful number, since it uses less digits than its factorization.

45143781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485451.

The product of its digits is 13440, while the sum is 33.

The square root of 45143781 is about 6718.9121887401. The cubic root of 45143781 is about 356.0677526436.

The spelling of 45143781 in words is "forty-five million, one hundred forty-three thousand, seven hundred eighty-one".