42737231 has 2 divisors, whose sum is σ = 42737232. Its totient is φ = 42737230.

The previous prime is 42737209. The next prime is 42737249. The reversal of 42737231 is 13273724.

42737231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42737231 is a prime.

It is a super-2 number, since 2×42737231² = 3652941827094722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42737194 and 42737203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42737291) 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 as a sum of consecutive naturals, namely, 21368615 + 21368616.

It is an arithmetic number, because the mean of its divisors is an integer number (21368616).

Almost surely, 2^42737231 is an apocalyptic number.

42737231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42737231 is an equidigital number, since it uses as much as digits as its factorization.

42737231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 29.

The square root of 42737231 is about 6537.3718725494. The cubic root of 42737231 is about 349.6247161169.

It can be divided in two parts, 4273723 and 1, that added together give a palindrome (4273724).

The spelling of 42737231 in words is "forty-two million, seven hundred thirty-seven thousand, two hundred thirty-one".