42115331 has 2 divisors, whose sum is σ = 42115332. Its totient is φ = 42115330.

The previous prime is 42115313. The next prime is 42115349. The reversal of 42115331 is 13351124.

Together with previous prime (42115313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (42115313) and next prime (42115349).

It is a cyclic number.

It is not a de Polignac number, because 42115331 - 2¹⁸ = 41853187 is a prime.

It is a super-2 number, since 2×42115331² = 3547402210479122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42115351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21057665 + 21057666.

It is an arithmetic number, because the mean of its divisors is an integer number (21057666).

Almost surely, 2^42115331 is an apocalyptic number.

42115331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42115331 is an equidigital number, since it uses as much as digits as its factorization.

42115331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 42115331 is about 6489.6325781973. The cubic root of 42115331 is about 347.9205432503.

Adding to 42115331 its reverse (13351124), we get a palindrome (55466455).

The spelling of 42115331 in words is "forty-two million, one hundred fifteen thousand, three hundred thirty-one".