155216325 has 48 divisors (see below), whose sum is σ = 285981696. Its totient is φ = 73636800.

The previous prime is 155216311. The next prime is 155216329. The reversal of 155216325 is 523612551.

It is a happy number.

It is not a de Polignac number, because 155216325 - 2⁴ = 155216309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155216292 and 155216301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155216329) 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 47 ways as a sum of consecutive naturals, for example, 36774 + ... + 40776.

It is an arithmetic number, because the mean of its divisors is an integer number (5957952).

Almost surely, 2^155216325 is an apocalyptic number.

155216325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155216325 is a deficient number, since it is larger than the sum of its proper divisors (130765371).

155216325 is a wasteful number, since it uses less digits than its factorization.

155216325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074 (or 4069 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 155216325 is about 12458.5843898896. The cubic root of 155216325 is about 537.4183182169.

Adding to 155216325 its reverse (523612551), we get a palindrome (678828876).

The spelling of 155216325 in words is "one hundred fifty-five million, two hundred sixteen thousand, three hundred twenty-five".