155403430 has 32 divisors (see below), whose sum is σ = 344280384. Its totient is φ = 49182336.

The previous prime is 155403427. The next prime is 155403449. The reversal of 155403430 is 34304551.

It is a junction number, because it is equal to n+sod(n) for n = 155403395 and 155403404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84477 + ... + 86296.

It is an arithmetic number, because the mean of its divisors is an integer number (10758762).

Almost surely, 2^155403430 is an apocalyptic number.

155403430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155403430 is an abundant number, since it is smaller than the sum of its proper divisors (188876954).

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

155403430 is a wasteful number, since it uses less digits than its factorization.

155403430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170800.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 155403430 is about 12466.0912077523. The cubic root of 155403430 is about 537.6341745440.

Adding to 155403430 its reverse (34304551), we get a palindrome (189707981).

The spelling of 155403430 in words is "one hundred fifty-five million, four hundred three thousand, four hundred thirty".