155533201 has 2 divisors, whose sum is σ = 155533202. Its totient is φ = 155533200.

The previous prime is 155533129. The next prime is 155533211. The reversal of 155533201 is 102335551.

155533201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121881600 + 33651601 = 11040^2 + 5801^2 .

It is a cyclic number.

It is not a de Polignac number, because 155533201 - 2⁷ = 155533073 is a prime.

It is a super-2 number, since 2×155533201² = 48381153226612802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155533211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77766600 + 77766601.

It is an arithmetic number, because the mean of its divisors is an integer number (77766601).

Almost surely, 2^155533201 is an apocalyptic number.

It is an amenable number.

155533201 is a deficient number, since it is larger than the sum of its proper divisors (1).

155533201 is an equidigital number, since it uses as much as digits as its factorization.

155533201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 155533201 is about 12471.2950811052. The cubic root of 155533201 is about 537.7837849547.

Adding to 155533201 its reverse (102335551), we get a palindrome (257868752).

The spelling of 155533201 in words is "one hundred fifty-five million, five hundred thirty-three thousand, two hundred one".