155255701 has 2 divisors, whose sum is σ = 155255702. Its totient is φ = 155255700.

The previous prime is 155255693. The next prime is 155255731. The reversal of 155255701 is 107552551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133957476 + 21298225 = 11574^2 + 4615^2 .

It is an emirp because it is prime and its reverse (107552551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155255701 - 2³ = 155255693 is a prime.

It is a Chen prime.

It is equal to p_8723119 and since 155255701 and 8723119 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155255731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77627850 + 77627851.

It is an arithmetic number, because the mean of its divisors is an integer number (77627851).

Almost surely, 2^155255701 is an apocalyptic number.

155255701 is the 7881-st centered pentagonal number.

It is an amenable number.

155255701 is a deficient number, since it is larger than the sum of its proper divisors (1).

155255701 is an equidigital number, since it uses as much as digits as its factorization.

155255701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8750, while the sum is 31.

The square root of 155255701 is about 12460.1645655264. The cubic root of 155255701 is about 537.4637593016.

The spelling of 155255701 in words is "one hundred fifty-five million, two hundred fifty-five thousand, seven hundred one".