42311540 has 24 divisors (see below), whose sum is σ = 89406240. Its totient is φ = 16819488.

The previous prime is 42311519. The next prime is 42311557. The reversal of 42311540 is 4511324.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3230 + ... + 9749.

It is an arithmetic number, because the mean of its divisors is an integer number (3725260).

Almost surely, 2^42311540 is an apocalyptic number.

It is an amenable number.

42311540 is an abundant number, since it is smaller than the sum of its proper divisors (47094700).

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

42311540 is a wasteful number, since it uses less digits than its factorization.

42311540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13151 (or 13149 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 42311540 is about 6504.7321236159. The cubic root of 42311540 is about 348.4600095320.

Adding to 42311540 its reverse (4511324), we get a palindrome (46822864).

The spelling of 42311540 in words is "forty-two million, three hundred eleven thousand, five hundred forty".