155531230 has 8 divisors (see below), whose sum is σ = 279956232. Its totient is φ = 62212488.

The previous prime is 155531219. The next prime is 155531237. The reversal of 155531230 is 32135551.

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

It is a junction number, because it is equal to n+sod(n) for n = 155531195 and 155531204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155531237) 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, 7776552 + ... + 7776571.

It is an arithmetic number, because the mean of its divisors is an integer number (34994529).

Almost surely, 2^155531230 is an apocalyptic number.

155531230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155531230 is a deficient number, since it is larger than the sum of its proper divisors (124425002).

155531230 is a wasteful number, since it uses less digits than its factorization.

155531230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15553130.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 155531230 is about 12471.2160593905. The cubic root of 155531230 is about 537.7815132504.

Adding to 155531230 its reverse (32135551), we get a palindrome (187666781).

The spelling of 155531230 in words is "one hundred fifty-five million, five hundred thirty-one thousand, two hundred thirty".