155898601 has 4 divisors (see below), whose sum is σ = 156102100. Its totient is φ = 155695104.

The previous prime is 155898571. The next prime is 155898643. The reversal of 155898601 is 106898551.

155898601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113635600 + 42263001 = 10660^2 + 6501^2 .

It is a cyclic number.

It is not a de Polignac number, because 155898601 - 2⁹ = 155898089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155898901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100596 + ... + 102133.

It is an arithmetic number, because the mean of its divisors is an integer number (39025525).

Almost surely, 2^155898601 is an apocalyptic number.

It is an amenable number.

155898601 is a deficient number, since it is larger than the sum of its proper divisors (203499).

155898601 is an equidigital number, since it uses as much as digits as its factorization.

155898601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203498.

The product of its (nonzero) digits is 86400, while the sum is 43.

The square root of 155898601 is about 12485.9361283005. The cubic root of 155898601 is about 538.2046008059.

Subtracting from 155898601 its reverse (106898551), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 155898601 in words is "one hundred fifty-five million, eight hundred ninety-eight thousand, six hundred one".