155322540 has 144 divisors (see below), whose sum is σ = 503350848. Its totient is φ = 38633472.

The previous prime is 155322529. The next prime is 155322551. The reversal of 155322540 is 45223551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155322529) and next prime (155322551).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 590449 + ... + 590711.

It is an arithmetic number, because the mean of its divisors is an integer number (3495492).

Almost surely, 2^155322540 is an apocalyptic number.

155322540 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 155322540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251675424).

155322540 is an abundant number, since it is smaller than the sum of its proper divisors (348028308).

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

155322540 is a wasteful number, since it uses less digits than its factorization.

155322540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 155322540 is about 12462.8463843538. The cubic root of 155322540 is about 537.5408759251.

The spelling of 155322540 in words is "one hundred fifty-five million, three hundred twenty-two thousand, five hundred forty".