155055001 has 2 divisors, whose sum is σ = 155055002. Its totient is φ = 155055000.

The previous prime is 155054969. The next prime is 155055013. The reversal of 155055001 is 100550551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154753600 + 301401 = 12440^2 + 549^2 .

It is a cyclic number.

It is not a de Polignac number, because 155055001 - 2⁵ = 155054969 is a prime.

It is a super-2 number, since 2×155055001² = 48084106670220002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155055031) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77527500 + 77527501.

It is an arithmetic number, because the mean of its divisors is an integer number (77527501).

Almost surely, 2^155055001 is an apocalyptic number.

It is an amenable number.

155055001 is a deficient number, since it is larger than the sum of its proper divisors (1).

155055001 is an equidigital number, since it uses as much as digits as its factorization.

155055001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 155055001 is about 12452.1082953852. The cubic root of 155055001 is about 537.2320651992.

The spelling of 155055001 in words is "one hundred fifty-five million, fifty-five thousand, one".