32155139 has 2 divisors, whose sum is σ = 32155140. Its totient is φ = 32155138.

The previous prime is 32155121. The next prime is 32155141. The reversal of 32155139 is 93155123.

It is a strong prime.

It is an emirp because it is prime and its reverse (93155123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32155139 is a prime.

Together with 32155141, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1982810 and since 32155139 and 1982810 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (32155159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16077569 + 16077570.

It is an arithmetic number, because the mean of its divisors is an integer number (16077570).

Almost surely, 2^32155139 is an apocalyptic number.

32155139 is a deficient number, since it is larger than the sum of its proper divisors (1).

32155139 is an equidigital number, since it uses as much as digits as its factorization.

32155139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 29.

The square root of 32155139 is about 5670.5501496768. The cubic root of 32155139 is about 317.9924414432.

The spelling of 32155139 in words is "thirty-two million, one hundred fifty-five thousand, one hundred thirty-nine".