155225001 has 8 divisors (see below), whose sum is σ = 207036000. Its totient is φ = 103448672.

The previous prime is 155224987. The next prime is 155225009. The reversal of 155225001 is 100522551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155225001 - 2⁷ = 155224873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155225009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4750 + ... + 18248.

It is an arithmetic number, because the mean of its divisors is an integer number (25879500).

Almost surely, 2^155225001 is an apocalyptic number.

It is an amenable number.

155225001 is a deficient number, since it is larger than the sum of its proper divisors (51810999).

155225001 is a wasteful number, since it uses less digits than its factorization.

155225001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17335.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 155225001 is about 12458.9325786762. The cubic root of 155225001 is about 537.4283312411.

Adding to 155225001 its reverse (100522551), we get a palindrome (255747552).

The spelling of 155225001 in words is "one hundred fifty-five million, two hundred twenty-five thousand, one".