215742119 has 2 divisors, whose sum is σ = 215742120. Its totient is φ = 215742118.

The previous prime is 215742061. The next prime is 215742157. The reversal of 215742119 is 911247512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215742119 is a prime.

It is a super-2 number, since 2×215742119² = 93089323821220322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215742179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107871059 + 107871060.

It is an arithmetic number, because the mean of its divisors is an integer number (107871060).

Almost surely, 2^215742119 is an apocalyptic number.

215742119 is a deficient number, since it is larger than the sum of its proper divisors (1).

215742119 is an equidigital number, since it uses as much as digits as its factorization.

215742119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 215742119 is about 14688.1625467585. The cubic root of 215742119 is about 599.7611262078.

The spelling of 215742119 in words is "two hundred fifteen million, seven hundred forty-two thousand, one hundred nineteen".