42831481 has 8 divisors (see below), whose sum is σ = 53400384. Its totient is φ = 33375120.

The previous prime is 42831479. The next prime is 42831493. The reversal of 42831481 is 18413824.

42831481 = 449² + 450² + ... + 602².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42831481 - 2¹ = 42831479 is a prime.

It is a super-2 number, since 2×42831481² = 3669071529306722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42831401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278050 + ... + 278203.

It is an arithmetic number, because the mean of its divisors is an integer number (6675048).

Almost surely, 2^42831481 is an apocalyptic number.

It is an amenable number.

42831481 is a deficient number, since it is larger than the sum of its proper divisors (10568903).

42831481 is a wasteful number, since it uses less digits than its factorization.

42831481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556271.

The product of its digits is 6144, while the sum is 31.

The square root of 42831481 is about 6544.5764568840. The cubic root of 42831481 is about 349.8815408639.

The spelling of 42831481 in words is "forty-two million, eight hundred thirty-one thousand, four hundred eighty-one".