155420432 has 20 divisors (see below), whose sum is σ = 302873100. Its totient is φ = 77259648.

The previous prime is 155420383. The next prime is 155420459. The reversal of 155420432 is 234024551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 132342016 + 23078416 = 11504^2 + 4804^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25307 + ... + 30842.

It is an arithmetic number, because the mean of its divisors is an integer number (15143655).

Almost surely, 2^155420432 is an apocalyptic number.

It is an amenable number.

155420432 is a deficient number, since it is larger than the sum of its proper divisors (147452668).

155420432 is a wasteful number, since it uses less digits than its factorization.

155420432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56330 (or 56324 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 155420432 is about 12466.7731189751. The cubic root of 155420432 is about 537.6537805525.

Adding to 155420432 its reverse (234024551), we get a palindrome (389444983).

The spelling of 155420432 in words is "one hundred fifty-five million, four hundred twenty thousand, four hundred thirty-two".