155321532 has 36 divisors (see below), whose sum is σ = 405286336. Its totient is φ = 50103360.

The previous prime is 155321527. The next prime is 155321539. The reversal of 155321532 is 235123551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 155321496 and 155321505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155321539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68473 + ... + 70704.

Almost surely, 2^155321532 is an apocalyptic number.

155321532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155321532 is an abundant number, since it is smaller than the sum of its proper divisors (249964804).

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

155321532 is a wasteful number, since it uses less digits than its factorization.

155321532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139218 (or 139213 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 155321532 is about 12462.8059440882. The cubic root of 155321532 is about 537.5397130924.

The spelling of 155321532 in words is "one hundred fifty-five million, three hundred twenty-one thousand, five hundred thirty-two".