155213332 has 12 divisors (see below), whose sum is σ = 287601300. Its totient is φ = 73041536.

The previous prime is 155213329. The next prime is 155213347. The reversal of 155213332 is 233312551.

It can be written as a sum of positive squares in 2 ways, for example, as 132802576 + 22410756 = 11524^2 + 4734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155213297 and 155213306.

It is a congruent number.

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, 1141207 + ... + 1141342.

It is an arithmetic number, because the mean of its divisors is an integer number (23966775).

Almost surely, 2^155213332 is an apocalyptic number.

It is an amenable number.

155213332 is a deficient number, since it is larger than the sum of its proper divisors (132387968).

155213332 is a wasteful number, since it uses less digits than its factorization.

155213332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282570 (or 2282568 counting only the distinct ones).

The product of its digits is 2700, while the sum is 25.

The square root of 155213332 is about 12458.4642713298. The cubic root of 155213332 is about 537.4148638909.

Adding to 155213332 its reverse (233312551), we get a palindrome (388525883).

It can be divided in two parts, 1552 and 13332, that added together give a square (14884 = 122²).

The spelling of 155213332 in words is "one hundred fifty-five million, two hundred thirteen thousand, three hundred thirty-two".