155225340 has 108 divisors (see below), whose sum is σ = 481464984. Its totient is φ = 40480128.

The previous prime is 155225333. The next prime is 155225341. The reversal of 155225340 is 43522551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155225341) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 505467 + ... + 505773.

Almost surely, 2^155225340 is an apocalyptic number.

155225340 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 155225340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240732492).

155225340 is an abundant number, since it is smaller than the sum of its proper divisors (326239644).

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

155225340 is a wasteful number, since it uses less digits than its factorization.

155225340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 370 counting only the distinct ones).

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

The square root of 155225340 is about 12458.9461833656. The cubic root of 155225340 is about 537.4287224755.

Adding to 155225340 its reverse (43522551), we get a palindrome (198747891).

The spelling of 155225340 in words is "one hundred fifty-five million, two hundred twenty-five thousand, three hundred forty".