155230131 has 8 divisors (see below), whose sum is σ = 236541184. Its totient is φ = 88702920.

The previous prime is 155230099. The next prime is 155230147. The reversal of 155230131 is 131032551.

155230131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 155230131 - 2⁵ = 155230099 is a prime.

It is a super-2 number, since 2×155230131² = 48192787140554322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 7391911 = 155230131 / (1 + 5 + 5 + 2 + 3 + 0 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155230098 and 155230107.

It is not an unprimeable number, because it can be changed into a prime (155230531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3695935 + ... + 3695976.

It is an arithmetic number, because the mean of its divisors is an integer number (29567648).

Almost surely, 2^155230131 is an apocalyptic number.

155230131 is a deficient number, since it is larger than the sum of its proper divisors (81311053).

155230131 is an equidigital number, since it uses as much as digits as its factorization.

155230131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7391921.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 155230131 is about 12459.1384533602. The cubic root of 155230131 is about 537.4342516297.

Adding to 155230131 its reverse (131032551), we get a palindrome (286262682).

The spelling of 155230131 in words is "one hundred fifty-five million, two hundred thirty thousand, one hundred thirty-one".