155371147 has 2 divisors, whose sum is σ = 155371148. Its totient is φ = 155371146.

The previous prime is 155371133. The next prime is 155371159. The reversal of 155371147 is 741173551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155371147 is a prime.

It is not a weakly prime, because it can be changed into another prime (155371247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77685573 + 77685574.

It is an arithmetic number, because the mean of its divisors is an integer number (77685574).

Almost surely, 2^155371147 is an apocalyptic number.

155371147 is a deficient number, since it is larger than the sum of its proper divisors (1).

155371147 is an equidigital number, since it uses as much as digits as its factorization.

155371147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 34.

The square root of 155371147 is about 12464.7963080028. The cubic root of 155371147 is about 537.5969431778.

The spelling of 155371147 in words is "one hundred fifty-five million, three hundred seventy-one thousand, one hundred forty-seven".