155317632 has 64 divisors (see below), whose sum is σ = 413862960. Its totient is φ = 51609600.

The previous prime is 155317621. The next prime is 155317633. The reversal of 155317632 is 236713551.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 155317593 and 155317602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155317633) by changing a digit.

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, 230448 + ... + 231120.

Almost surely, 2^155317632 is an apocalyptic number.

155317632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155317632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206931480).

155317632 is an abundant number, since it is smaller than the sum of its proper divisors (258545328).

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

155317632 is an equidigital number, since it uses as much as digits as its factorization.

155317632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1279 counting only the distinct ones).

The product of its digits is 18900, while the sum is 33.

The square root of 155317632 is about 12462.6494775389. The cubic root of 155317632 is about 537.5352139900.

The spelling of 155317632 in words is "one hundred fifty-five million, three hundred seventeen thousand, six hundred thirty-two".