155320001 has 2 divisors, whose sum is σ = 155320002. Its totient is φ = 155320000.

The previous prime is 155319991. The next prime is 155320049. The reversal of 155320001 is 100023551.

155320001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153760000 + 1560001 = 12400^2 + 1249^2 .

It is a cyclic number.

It is not a de Polignac number, because 155320001 - 2²² = 151125697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (155320901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77660000 + 77660001.

It is an arithmetic number, because the mean of its divisors is an integer number (77660001).

Almost surely, 2^155320001 is an apocalyptic number.

It is an amenable number.

155320001 is a deficient number, since it is larger than the sum of its proper divisors (1).

155320001 is an equidigital number, since it uses as much as digits as its factorization.

155320001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 155320001 is about 12462.7445211719. The cubic root of 155320001 is about 537.5379469153.

Adding to 155320001 its reverse (100023551), we get a palindrome (255343552).

The spelling of 155320001 in words is "one hundred fifty-five million, three hundred twenty thousand, one".