155213000 has 64 divisors (see below), whose sum is σ = 365180400. Its totient is φ = 61747200.

The previous prime is 155212963. The next prime is 155213021. The reversal of 155213000 is 312551.

It can be written as a sum of positive squares in 8 ways, for example, as 10876804 + 144336196 = 3298^2 + 12014^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155213000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268712 + ... + 269288.

Almost surely, 2^155213000 is an apocalyptic number.

155213000 is a gapful number since it is divisible by the number (10) 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 155213000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182590200).

155213000 is an abundant number, since it is smaller than the sum of its proper divisors (209967400).

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

155213000 is a wasteful number, since it uses less digits than its factorization.

155213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 155213000 is about 12458.4509470480. The cubic root of 155213000 is about 537.4144807154.

Adding to 155213000 its reverse (312551), we get a palindrome (155525551).

The spelling of 155213000 in words is "one hundred fifty-five million, two hundred thirteen thousand".