155312401 has 2 divisors, whose sum is σ = 155312402. Its totient is φ = 155312400.

The previous prime is 155312369. The next prime is 155312411. The reversal of 155312401 is 104213551.

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., 83740801 + 71571600 = 9151^2 + 8460^2 .

It is a cyclic number.

It is not a de Polignac number, because 155312401 - 2⁵ = 155312369 is a prime.

It is not a weakly prime, because it can be changed into another prime (155312411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77656200 + 77656201.

It is an arithmetic number, because the mean of its divisors is an integer number (77656201).

Almost surely, 2^155312401 is an apocalyptic number.

It is an amenable number.

155312401 is a deficient number, since it is larger than the sum of its proper divisors (1).

155312401 is an equidigital number, since it uses as much as digits as its factorization.

155312401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 155312401 is about 12462.4396086802. The cubic root of 155312401 is about 537.5291793065.

Adding to 155312401 its reverse (104213551), we get a palindrome (259525952).

The spelling of 155312401 in words is "one hundred fifty-five million, three hundred twelve thousand, four hundred one".