155421032 has 32 divisors (see below), whose sum is σ = 314344800. Its totient is φ = 71615424.

The previous prime is 155421001. The next prime is 155421103. The reversal of 155421032 is 230124551.

It is a junction number, because it is equal to n+sod(n) for n = 155420989 and 155421007.

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 7 ways as a sum of consecutive naturals, for example, 122819 + ... + 124077.

It is an arithmetic number, because the mean of its divisors is an integer number (9823275).

Almost surely, 2^155421032 is an apocalyptic number.

It is an amenable number.

155421032 is an abundant number, since it is smaller than the sum of its proper divisors (158923768).

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

155421032 is a wasteful number, since it uses less digits than its factorization.

155421032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465 (or 2461 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 155421032 is about 12466.7971829175. The cubic root of 155421032 is about 537.6544724217.

Adding to 155421032 its reverse (230124551), we get a palindrome (385545583).

The spelling of 155421032 in words is "one hundred fifty-five million, four hundred twenty-one thousand, thirty-two".