45687381 has 16 divisors (see below), whose sum is σ = 67896000. Its totient is φ = 27157248.

The previous prime is 45687379. The next prime is 45687403. The reversal of 45687381 is 18378654.

It is not a de Polignac number, because 45687381 - 2¹ = 45687379 is a prime.

It is a super-2 number, since 2×45687381² = 4174673565278322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45687311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22606 + ... + 24543.

It is an arithmetic number, because the mean of its divisors is an integer number (4243500).

Almost surely, 2^45687381 is an apocalyptic number.

It is an amenable number.

45687381 is a deficient number, since it is larger than the sum of its proper divisors (22208619).

45687381 is a wasteful number, since it uses less digits than its factorization.

45687381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47188.

The product of its digits is 161280, while the sum is 42.

The square root of 45687381 is about 6759.2441145442. The cubic root of 45687381 is about 357.4912538001.

The spelling of 45687381 in words is "forty-five million, six hundred eighty-seven thousand, three hundred eighty-one".