155382001 has 2 divisors, whose sum is σ = 155382002. Its totient is φ = 155382000.

The previous prime is 155381983. The next prime is 155382049. The reversal of 155382001 is 100283551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155376225 + 5776 = 12465^2 + 76^2 .

It is an emirp because it is prime and its reverse (100283551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155382001 is a prime.

It is not a weakly prime, because it can be changed into another prime (155382301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77691000 + 77691001.

It is an arithmetic number, because the mean of its divisors is an integer number (77691001).

Almost surely, 2^155382001 is an apocalyptic number.

It is an amenable number.

155382001 is a deficient number, since it is larger than the sum of its proper divisors (1).

155382001 is an equidigital number, since it uses as much as digits as its factorization.

155382001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 155382001 is about 12465.2316865753. The cubic root of 155382001 is about 537.6094614637.

The spelling of 155382001 in words is "one hundred fifty-five million, three hundred eighty-two thousand, one".