155349012 has 72 divisors (see below), whose sum is σ = 454119456. Its totient is φ = 40969152.

The previous prime is 155349011. The next prime is 155349017. The reversal of 155349012 is 210943551.

It is a super-2 number, since 2×155349012² = 48266631058752288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155349011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2518 + ... + 17805.

Almost surely, 2^155349012 is an apocalyptic number.

155349012 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 155349012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227059728).

155349012 is an abundant number, since it is smaller than the sum of its proper divisors (298770444).

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

155349012 is a wasteful number, since it uses less digits than its factorization.

155349012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20357 (or 20348 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 155349012 is about 12463.9083757865. The cubic root of 155349012 is about 537.5714123253.

The spelling of 155349012 in words is "one hundred fifty-five million, three hundred forty-nine thousand, twelve".