155003225 has 24 divisors (see below), whose sum is σ = 207616920. Its totient is φ = 114117120.

The previous prime is 155003213. The next prime is 155003237. The reversal of 155003225 is 522300551.

155003225 = 8803² + 8804².

155003225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155003213) and next prime (155003237).

It can be written as a sum of positive squares in 12 ways, for example, as 85581001 + 69422224 = 9251^2 + 8332^2 .

It is a de Polignac number, because none of the positive numbers 2^k-155003225 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155003225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164957 + ... + 165893.

It is an arithmetic number, because the mean of its divisors is an integer number (8650705).

Almost surely, 2^155003225 is an apocalyptic number.

155003225 is the 8804-th centered square number.

It is an amenable number.

155003225 is a deficient number, since it is larger than the sum of its proper divisors (52613695).

155003225 is a wasteful number, since it uses less digits than its factorization.

155003225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469 (or 1464 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 155003225 is about 12450.0291164318. The cubic root of 155003225 is about 537.1722609924.

Adding to 155003225 its reverse (522300551), we get a palindrome (677303776).

The spelling of 155003225 in words is "one hundred fifty-five million, three thousand, two hundred twenty-five".