155403234 has 48 divisors (see below), whose sum is σ = 391135680. Its totient is φ = 43670880.

The previous prime is 155403233. The next prime is 155403263. The reversal of 155403234 is 432304551.

It is a junction number, because it is equal to n+sod(n) for n = 155403198 and 155403207.

It is not an unprimeable number, because it can be changed into a prime (155403233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2424 + ... + 17795.

It is an arithmetic number, because the mean of its divisors is an integer number (8148660).

Almost surely, 2^155403234 is an apocalyptic number.

155403234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

155403234 is an abundant number, since it is smaller than the sum of its proper divisors (235732446).

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

155403234 is a wasteful number, since it uses less digits than its factorization.

155403234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20295 (or 20292 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 155403234 is about 12466.0833464244. The cubic root of 155403234 is about 537.6339485165.

Adding to 155403234 its reverse (432304551), we get a palindrome (587707785).

The spelling of 155403234 in words is "one hundred fifty-five million, four hundred three thousand, two hundred thirty-four".