42670231 has 2 divisors, whose sum is σ = 42670232. Its totient is φ = 42670230.

The previous prime is 42670193. The next prime is 42670241. The reversal of 42670231 is 13207624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42670231 is a prime.

It is a super-2 number, since 2×42670231² = 3641497227186722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42670196 and 42670205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42670241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21335115 + 21335116.

It is an arithmetic number, because the mean of its divisors is an integer number (21335116).

Almost surely, 2^42670231 is an apocalyptic number.

42670231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42670231 is an equidigital number, since it uses as much as digits as its factorization.

42670231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 42670231 is about 6532.2454791595. The cubic root of 42670231 is about 349.4419160360.

Adding to 42670231 its reverse (13207624), we get a palindrome (55877855).

The spelling of 42670231 in words is "forty-two million, six hundred seventy thousand, two hundred thirty-one".