42077831 has 8 divisors (see below), whose sum is σ = 43186944. Its totient is φ = 40977720.

The previous prime is 42077807. The next prime is 42077851. The reversal of 42077831 is 13877024.

It is a happy number.

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 42077831 - 2¹⁸ = 41815687 is a prime.

It is a super-2 number, since 2×42077831² = 3541087723329122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42077801) 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, 7796 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (5398368).

Almost surely, 2^42077831 is an apocalyptic number.

42077831 is a deficient number, since it is larger than the sum of its proper divisors (1109113).

42077831 is a wasteful number, since it uses less digits than its factorization.

42077831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 42077831 is about 6486.7427110993. The cubic root of 42077831 is about 347.8172483662.

The spelling of 42077831 in words is "forty-two million, seventy-seven thousand, eight hundred thirty-one".