431071540 has 24 divisors (see below), whose sum is σ = 927331272. Its totient is φ = 168222720.

The previous prime is 431071519. The next prime is 431071541. The reversal of 431071540 is 45170134.

431071540 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 58890276 + 372181264 = 7674^2 + 19292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431071541) 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 7 ways as a sum of consecutive naturals, for example, 262029 + ... + 263668.

It is an arithmetic number, because the mean of its divisors is an integer number (38638803).

Almost surely, 2^431071540 is an apocalyptic number.

It is an amenable number.

431071540 is an abundant number, since it is smaller than the sum of its proper divisors (496259732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431071540 is a wasteful number, since it uses less digits than its factorization.

431071540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525747 (or 525745 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 431071540 is about 20762.2624008079. The cubic root of 431071540 is about 755.4106737610.

The spelling of 431071540 in words is "four hundred thirty-one million, seventy-one thousand, five hundred forty".