155151691 has 2 divisors, whose sum is σ = 155151692. Its totient is φ = 155151690.

The previous prime is 155151649. The next prime is 155151719. The reversal of 155151691 is 196151551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155151691 is a prime.

It is not a weakly prime, because it can be changed into another prime (155151631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77575845 + 77575846.

It is an arithmetic number, because the mean of its divisors is an integer number (77575846).

Almost surely, 2^155151691 is an apocalyptic number.

155151691 is a deficient number, since it is larger than the sum of its proper divisors (1).

155151691 is an equidigital number, since it uses as much as digits as its factorization.

155151691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6750, while the sum is 34.

The square root of 155151691 is about 12455.9901653783. The cubic root of 155151691 is about 537.3437119792.

The spelling of 155151691 in words is "one hundred fifty-five million, one hundred fifty-one thousand, six hundred ninety-one".