155212452 has 36 divisors (see below), whose sum is σ = 392823340. Its totient is φ = 51674112.

The previous prime is 155212439. The next prime is 155212459. The reversal of 155212452 is 254212551.

It can be written as a sum of positive squares in 2 ways, for example, as 44836416 + 110376036 = 6696^2 + 10506^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (155212459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34188 + ... + 38460.

Almost surely, 2^155212452 is an apocalyptic number.

155212452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155212452 is an abundant number, since it is smaller than the sum of its proper divisors (237610888).

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

155212452 is a wasteful number, since it uses less digits than its factorization.

155212452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292 (or 5287 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 155212452 is about 12458.4289539251. The cubic root of 155212452 is about 537.4138482437.

Subtracting 155212452 from its reverse (254212551), we obtain a palindrome (99000099).

The spelling of 155212452 in words is "one hundred fifty-five million, two hundred twelve thousand, four hundred fifty-two".