155455801 has 2 divisors, whose sum is σ = 155455802. Its totient is φ = 155455800.

The previous prime is 155455799. The next prime is 155455813. The reversal of 155455801 is 108554551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102515625 + 52940176 = 10125^2 + 7276^2 .

It is a cyclic number.

It is not a de Polignac number, because 155455801 - 2¹ = 155455799 is a prime.

Together with 155455799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (155455831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77727900 + 77727901.

It is an arithmetic number, because the mean of its divisors is an integer number (77727901).

Almost surely, 2^155455801 is an apocalyptic number.

It is an amenable number.

155455801 is a deficient number, since it is larger than the sum of its proper divisors (1).

155455801 is an equidigital number, since it uses as much as digits as its factorization.

155455801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20000, while the sum is 34.

The square root of 155455801 is about 12468.1915689486. The cubic root of 155455801 is about 537.6945620508.

The spelling of 155455801 in words is "one hundred fifty-five million, four hundred fifty-five thousand, eight hundred one".