42547431 has 8 divisors (see below), whose sum is σ = 56974320. Its totient is φ = 28242752.

The previous prime is 42547399. The next prime is 42547433. The reversal of 42547431 is 13474524.

42547431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42547431 - 2⁵ = 42547399 is a prime.

It is a super-2 number, since 2×42547431² = 3620567769399522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42547433) 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, 29736 + ... + 31133.

It is an arithmetic number, because the mean of its divisors is an integer number (7121790).

Almost surely, 2^42547431 is an apocalyptic number.

42547431 is a deficient number, since it is larger than the sum of its proper divisors (14426889).

42547431 is a wasteful number, since it uses less digits than its factorization.

42547431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61105.

The product of its digits is 13440, while the sum is 30.

The square root of 42547431 is about 6522.8391824420. The cubic root of 42547431 is about 349.1063761137.

The spelling of 42547431 in words is "forty-two million, five hundred forty-seven thousand, four hundred thirty-one".