155933201 has 4 divisors (see below), whose sum is σ = 155964900. Its totient is φ = 155901504.

The previous prime is 155933191. The next prime is 155933213. The reversal of 155933201 is 102339551.

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 112360000 + 43573201 = 10600^2 + 6601^2 .

It is a cyclic number.

It is not a de Polignac number, because 155933201 - 2²² = 151738897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155933221) 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, 6716 + ... + 18893.

It is an arithmetic number, because the mean of its divisors is an integer number (38991225).

Almost surely, 2^155933201 is an apocalyptic number.

155933201 is the 5585-th centered decagonal number.

It is an amenable number.

155933201 is a deficient number, since it is larger than the sum of its proper divisors (31699).

155933201 is an equidigital number, since it uses as much as digits as its factorization.

155933201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31698.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 155933201 is about 12487.3216103374. The cubic root of 155933201 is about 538.2444140811.

The spelling of 155933201 in words is "one hundred fifty-five million, nine hundred thirty-three thousand, two hundred one".