155432403 has 24 divisors (see below), whose sum is σ = 260109408. Its totient is φ = 87599232.

The previous prime is 155432383. The next prime is 155432437. The reversal of 155432403 is 304234551.

It is not a de Polignac number, because 155432403 - 2⁶ = 155432339 is a prime.

It is a super-4 number, since 4×155432403⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (155432443) 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, 12300 + ... + 21497.

It is an arithmetic number, because the mean of its divisors is an integer number (10837892).

Almost surely, 2^155432403 is an apocalyptic number.

155432403 is a deficient number, since it is larger than the sum of its proper divisors (104677005).

155432403 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 155432403 = (354423150)₉.

155432403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33883 (or 33880 counting only the distinct ones).

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

The square root of 155432403 is about 12467.2532259516. The cubic root of 155432403 is about 537.6675841605.

Adding to 155432403 its reverse (304234551), we get a palindrome (459666954).

The spelling of 155432403 in words is "one hundred fifty-five million, four hundred thirty-two thousand, four hundred three".