155147807 has 2 divisors, whose sum is σ = 155147808. Its totient is φ = 155147806.

The previous prime is 155147791. The next prime is 155147809. The reversal of 155147807 is 708741551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155147807 - 2⁴ = 155147791 is a prime.

Together with 155147809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155147809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77573903 + 77573904.

It is an arithmetic number, because the mean of its divisors is an integer number (77573904).

Almost surely, 2^155147807 is an apocalyptic number.

155147807 is a deficient number, since it is larger than the sum of its proper divisors (1).

155147807 is an equidigital number, since it uses as much as digits as its factorization.

155147807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39200, while the sum is 38.

The square root of 155147807 is about 12455.8342554804. The cubic root of 155147807 is about 537.3392280655.

The spelling of 155147807 in words is "one hundred fifty-five million, one hundred forty-seven thousand, eight hundred seven".