155531030 has 32 divisors (see below), whose sum is σ = 291852288. Its totient is φ = 59608800.

The previous prime is 155531009. The next prime is 155531039. The reversal of 155531030 is 30135551.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155530987 and 155531005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155531039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29495 + ... + 34365.

It is an arithmetic number, because the mean of its divisors is an integer number (9120384).

Almost surely, 2^155531030 is an apocalyptic number.

155531030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155531030 is a deficient number, since it is larger than the sum of its proper divisors (136321258).

155531030 is a wasteful number, since it uses less digits than its factorization.

155531030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5012.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 155531030 is about 12471.2080409237. The cubic root of 155531030 is about 537.7812827365.

Adding to 155531030 its reverse (30135551), we get a palindrome (185666581).

The spelling of 155531030 in words is "one hundred fifty-five million, five hundred thirty-one thousand, thirty".