155051040 has 96 divisors (see below), whose sum is σ = 490432320. Its totient is φ = 41176064.

The previous prime is 155051021. The next prime is 155051041. The reversal of 155051040 is 40150551.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 155050998 and 155051016.

It is not an unprimeable number, because it can be changed into a prime (155051041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151651 + ... + 152669.

It is an arithmetic number, because the mean of its divisors is an integer number (5108670).

Almost surely, 2^155051040 is an apocalyptic number.

155051040 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 155051040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245216160).

155051040 is an abundant number, since it is smaller than the sum of its proper divisors (335381280).

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

155051040 is a wasteful number, since it uses less digits than its factorization.

155051040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 155051040 is about 12451.9492449977. The cubic root of 155051040 is about 537.2274904906.

The spelling of 155051040 in words is "one hundred fifty-five million, fifty-one thousand, forty".