731423145 has 32 divisors (see below), whose sum is σ = 1271623680. Its totient is φ = 357635520.

The previous prime is 731423131. The next prime is 731423171. The reversal of 731423145 is 541324137.

It is a happy number.

It is not a de Polignac number, because 731423145 - 2⁴ = 731423129 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32559 + ... + 50228.

It is an arithmetic number, because the mean of its divisors is an integer number (39738240).

Almost surely, 2^731423145 is an apocalyptic number.

It is an amenable number.

731423145 is a deficient number, since it is larger than the sum of its proper divisors (540200535).

731423145 is a wasteful number, since it uses less digits than its factorization.

731423145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82845.

The product of its digits is 10080, while the sum is 30.

The square root of 731423145 is about 27044.8358286753. The cubic root of 731423145 is about 900.9960761970.

The spelling of 731423145 in words is "seven hundred thirty-one million, four hundred twenty-three thousand, one hundred forty-five".