155015873 has 2 divisors, whose sum is σ = 155015874. Its totient is φ = 155015872.

The previous prime is 155015867. The next prime is 155015879. The reversal of 155015873 is 378510551.

155015873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (155015867) and next prime (155015879).

It can be written as a sum of positive squares in only one way, i.e., 106337344 + 48678529 = 10312^2 + 6977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155015873 is a prime.

It is a Sophie Germain prime.

155015873 is a modest number, since divided by 15873 gives 155 as remainder.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (155015879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77507936 + 77507937.

It is an arithmetic number, because the mean of its divisors is an integer number (77507937).

Almost surely, 2^155015873 is an apocalyptic number.

It is an amenable number.

155015873 is a deficient number, since it is larger than the sum of its proper divisors (1).

155015873 is an equidigital number, since it uses as much as digits as its factorization.

155015873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 35.

The square root of 155015873 is about 12450.5370566896. The cubic root of 155015873 is about 537.1868713765.

The spelling of 155015873 in words is "one hundred fifty-five million, fifteen thousand, eight hundred seventy-three".