155156401 has 2 divisors, whose sum is σ = 155156402. Its totient is φ = 155156400.

The previous prime is 155156381. The next prime is 155156411. The reversal of 155156401 is 104651551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129390625 + 25765776 = 11375^2 + 5076^2 .

It is a cyclic number.

It is not a de Polignac number, because 155156401 - 2⁵ = 155156369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155156401.

It is not a weakly prime, because it can be changed into another prime (155156411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77578200 + 77578201.

It is an arithmetic number, because the mean of its divisors is an integer number (77578201).

Almost surely, 2^155156401 is an apocalyptic number.

It is an amenable number.

155156401 is a deficient number, since it is larger than the sum of its proper divisors (1).

155156401 is an equidigital number, since it uses as much as digits as its factorization.

155156401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 155156401 is about 12456.1792296033. The cubic root of 155156401 is about 537.3491493746.

The spelling of 155156401 in words is "one hundred fifty-five million, one hundred fifty-six thousand, four hundred one".