155251201 has 4 divisors (see below), whose sum is σ = 177429952. Its totient is φ = 133072452.

The previous prime is 155251189. The next prime is 155251231. The reversal of 155251201 is 102152551.

It is a happy number.

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 155251201 - 2¹¹ = 155249153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155251231) 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, 11089365 + ... + 11089378.

It is an arithmetic number, because the mean of its divisors is an integer number (44357488).

Almost surely, 2^155251201 is an apocalyptic number.

It is an amenable number.

155251201 is a deficient number, since it is larger than the sum of its proper divisors (22178751).

155251201 is an equidigital number, since it uses as much as digits as its factorization.

155251201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22178750.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 155251201 is about 12459.9839887538. The cubic root of 155251201 is about 537.4585665556.

The spelling of 155251201 in words is "one hundred fifty-five million, two hundred fifty-one thousand, two hundred one".