155016401 has 2 divisors, whose sum is σ = 155016402. Its totient is φ = 155016400.

The previous prime is 155016391. The next prime is 155016409. The reversal of 155016401 is 104610551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153388225 + 1628176 = 12385^2 + 1276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155016401 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (155016409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77508200 + 77508201.

It is an arithmetic number, because the mean of its divisors is an integer number (77508201).

Almost surely, 2^155016401 is an apocalyptic number.

It is an amenable number.

155016401 is a deficient number, since it is larger than the sum of its proper divisors (1).

155016401 is an equidigital number, since it uses as much as digits as its factorization.

155016401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 155016401 is about 12450.5582605761. The cubic root of 155016401 is about 537.1874812804.

Adding to 155016401 its reverse (104610551), we get a palindrome (259626952).

The spelling of 155016401 in words is "one hundred fifty-five million, sixteen thousand, four hundred one".