155215132 has 24 divisors (see below), whose sum is σ = 286374816. Its totient is φ = 73463808.

The previous prime is 155215121. The next prime is 155215133. The reversal of 155215132 is 231512551.

It is a junction number, because it is equal to n+sod(n) for n = 155215097 and 155215106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155215133) 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, 228 + ... + 17620.

It is an arithmetic number, because the mean of its divisors is an integer number (11932284).

Almost surely, 2^155215132 is an apocalyptic number.

It is an amenable number.

155215132 is a deficient number, since it is larger than the sum of its proper divisors (131159684).

155215132 is a wasteful number, since it uses less digits than its factorization.

155215132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17517 (or 17515 counting only the distinct ones).

The product of its digits is 1500, while the sum is 25.

The square root of 155215132 is about 12458.5365111637. The cubic root of 155215132 is about 537.4169413392.

Adding to 155215132 its reverse (231512551), we get a palindrome (386727683).

The spelling of 155215132 in words is "one hundred fifty-five million, two hundred fifteen thousand, one hundred thirty-two".