155212134 has 32 divisors (see below), whose sum is σ = 387023616. Its totient is φ = 40314720.

The previous prime is 155212129. The next prime is 155212171. The reversal of 155212134 is 431212551.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 167517 + ... + 168440.

It is an arithmetic number, because the mean of its divisors is an integer number (12094488).

Almost surely, 2^155212134 is an apocalyptic number.

155212134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

155212134 is an abundant number, since it is smaller than the sum of its proper divisors (231811482).

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

155212134 is a wasteful number, since it uses less digits than its factorization.

155212134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335980.

The product of its digits is 1200, while the sum is 24.

The square root of 155212134 is about 12458.4161914747. The cubic root of 155212134 is about 537.4134812248.

Adding to 155212134 its reverse (431212551), we get a palindrome (586424685).

The spelling of 155212134 in words is "one hundred fifty-five million, two hundred twelve thousand, one hundred thirty-four".