155021432 has 32 divisors (see below), whose sum is σ = 294621600. Its totient is φ = 76464000.

The previous prime is 155021431. The next prime is 155021459. The reversal of 155021432 is 234120551.

155021432 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 155021398 and 155021407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155021431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218294 + ... + 219002.

It is an arithmetic number, because the mean of its divisors is an integer number (9206925).

Almost surely, 2^155021432 is an apocalyptic number.

It is an amenable number.

155021432 is a deficient number, since it is larger than the sum of its proper divisors (139600168).

155021432 is a wasteful number, since it uses less digits than its factorization.

155021432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1043 counting only the distinct ones).

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

The square root of 155021432 is about 12450.7602980702. The cubic root of 155021432 is about 537.1932926245.

Adding to 155021432 its reverse (234120551), we get a palindrome (389141983).

The spelling of 155021432 in words is "one hundred fifty-five million, twenty-one thousand, four hundred thirty-two".