42437731 has 4 divisors (see below), whose sum is σ = 48500272. Its totient is φ = 36375192.

The previous prime is 42437719. The next prime is 42437743. The reversal of 42437731 is 13773424.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42437719) and next prime (42437743).

It is not a de Polignac number, because 42437731 - 2⁵ = 42437699 is a prime.

It is a super-2 number, since 2×42437731² = 3601922024856722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42437693 and 42437702.

It is not an unprimeable number, because it can be changed into a prime (42437711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3031260 + ... + 3031273.

It is an arithmetic number, because the mean of its divisors is an integer number (12125068).

Almost surely, 2^42437731 is an apocalyptic number.

42437731 is a deficient number, since it is larger than the sum of its proper divisors (6062541).

42437731 is an equidigital number, since it uses as much as digits as its factorization.

42437731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6062540.

The product of its digits is 14112, while the sum is 31.

The square root of 42437731 is about 6514.4248403063. The cubic root of 42437731 is about 348.8060843415.

The spelling of 42437731 in words is "forty-two million, four hundred thirty-seven thousand, seven hundred thirty-one".