155563000 has 64 divisors (see below), whose sum is σ = 369177120. Its totient is φ = 61344000.

The previous prime is 155562983. The next prime is 155563019. The reversal of 155563000 is 365551.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 71935 + ... + 74065.

Almost surely, 2^155563000 is an apocalyptic number.

155563000 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 155563000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184588560).

155563000 is an abundant number, since it is smaller than the sum of its proper divisors (213614120).

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

155563000 is a wasteful number, since it uses less digits than its factorization.

155563000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225 (or 2211 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 155563000 is about 12472.4897273961. The cubic root of 155563000 is about 537.8181278808.

The spelling of 155563000 in words is "one hundred fifty-five million, five hundred sixty-three thousand".