155332201 has 4 divisors (see below), whose sum is σ = 163507600. Its totient is φ = 147156804.

The previous prime is 155332193. The next prime is 155332223. The reversal of 155332201 is 102233551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155332201 - 2³ = 155332193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155332301) 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, 4087671 + ... + 4087708.

It is an arithmetic number, because the mean of its divisors is an integer number (40876900).

Almost surely, 2^155332201 is an apocalyptic number.

It is an amenable number.

155332201 is a deficient number, since it is larger than the sum of its proper divisors (8175399).

155332201 is an equidigital number, since it uses as much as digits as its factorization.

155332201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8175398.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 155332201 is about 12463.2339703626. The cubic root of 155332201 is about 537.5520206367.

Adding to 155332201 its reverse (102233551), we get a palindrome (257565752).

The spelling of 155332201 in words is "one hundred fifty-five million, three hundred thirty-two thousand, two hundred one".