42470231 has 2 divisors, whose sum is σ = 42470232. Its totient is φ = 42470230.

The previous prime is 42470201. The next prime is 42470237. The reversal of 42470231 is 13207424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42470231 - 2²² = 38275927 is a prime.

It is a super-2 number, since 2×42470231² = 3607441042386722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 42470197 and 42470206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42470237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21235115 + 21235116.

It is an arithmetic number, because the mean of its divisors is an integer number (21235116).

Almost surely, 2^42470231 is an apocalyptic number.

42470231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42470231 is an equidigital number, since it uses as much as digits as its factorization.

42470231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 42470231 is about 6516.9188271759. The cubic root of 42470231 is about 348.8951034357.

Adding to 42470231 its reverse (13207424), we get a palindrome (55677655).

The spelling of 42470231 in words is "forty-two million, four hundred seventy thousand, two hundred thirty-one".