155311230 has 32 divisors (see below), whose sum is σ = 376941600. Its totient is φ = 40950272.

The previous prime is 155311217. The next prime is 155311241. The reversal of 155311230 is 32113551.

It is a super-2 number, since 2×155311230² = 48243156328225800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155311197 and 155311206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26415 + ... + 31754.

It is an arithmetic number, because the mean of its divisors is an integer number (11779425).

Almost surely, 2^155311230 is an apocalyptic number.

155311230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155311230 is an abundant number, since it is smaller than the sum of its proper divisors (221630370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155311230 is a wasteful number, since it uses less digits than its factorization.

155311230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58268.

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

The square root of 155311230 is about 12462.3926274211. The cubic root of 155311230 is about 537.5278283771.

Adding to 155311230 its reverse (32113551), we get a palindrome (187424781).

It can be divided in two parts, 15531 and 1230, that added together give a palindrome (16761).

The spelling of 155311230 in words is "one hundred fifty-five million, three hundred eleven thousand, two hundred thirty".