45293781 has 32 divisors (see below), whose sum is σ = 67217920. Its totient is φ = 26956800.

The previous prime is 45293779. The next prime is 45293803. The reversal of 45293781 is 18739254.

It is not a de Polignac number, because 45293781 - 2¹ = 45293779 is a prime.

It is a super-2 number, since 2×45293781² = 4103053194551922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45293741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187821 + ... + 188061.

It is an arithmetic number, because the mean of its divisors is an integer number (2100560).

Almost surely, 2^45293781 is an apocalyptic number.

It is an amenable number.

45293781 is a deficient number, since it is larger than the sum of its proper divisors (21924139).

45293781 is a wasteful number, since it uses less digits than its factorization.

45293781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its digits is 60480, while the sum is 39.

The square root of 45293781 is about 6730.0654528764. The cubic root of 45293781 is about 356.4616874231.

The spelling of 45293781 in words is "forty-five million, two hundred ninety-three thousand, seven hundred eighty-one".