45405731 has 16 divisors (see below), whose sum is σ = 54233088. Its totient is φ = 37195200.

The previous prime is 45405727. The next prime is 45405739. The reversal of 45405731 is 13750454.

45405731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45405731 - 2² = 45405727 is a prime.

It is a super-2 number, since 2×45405731² = 4123360815288722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45405694 and 45405703.

It is not an unprimeable number, because it can be changed into a prime (45405739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16751 + ... + 19271.

It is an arithmetic number, because the mean of its divisors is an integer number (3389568).

Almost surely, 2^45405731 is an apocalyptic number.

45405731 is a deficient number, since it is larger than the sum of its proper divisors (8827357).

45405731 is a wasteful number, since it uses less digits than its factorization.

45405731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 45405731 is about 6738.3774753274. The cubic root of 45405731 is about 356.7551276586.

The spelling of 45405731 in words is "forty-five million, four hundred five thousand, seven hundred thirty-one".