155031201 has 48 divisors (see below), whose sum is σ = 256628736. Its totient is φ = 89451648.

The previous prime is 155031197. The next prime is 155031223. The reversal of 155031201 is 102130551.

155031201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155031201 - 2² = 155031197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155031251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142080 + ... + 143166.

It is an arithmetic number, because the mean of its divisors is an integer number (5346432).

Almost surely, 2^155031201 is an apocalyptic number.

It is an amenable number.

155031201 is a deficient number, since it is larger than the sum of its proper divisors (101597535).

155031201 is a wasteful number, since it uses less digits than its factorization.

155031201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 1179 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 155031201 is about 12451.1525972498. The cubic root of 155031201 is about 537.2045765074.

Adding to 155031201 its reverse (102130551), we get a palindrome (257161752).

The spelling of 155031201 in words is "one hundred fifty-five million, thirty-one thousand, two hundred one".