155342140 has 12 divisors (see below), whose sum is σ = 326218536. Its totient is φ = 62136848.

The previous prime is 155342137. The next prime is 155342149. The reversal of 155342140 is 41243551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155342149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3883534 + ... + 3883573.

It is an arithmetic number, because the mean of its divisors is an integer number (27184878).

Almost surely, 2^155342140 is an apocalyptic number.

155342140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155342140 is an abundant number, since it is smaller than the sum of its proper divisors (170876396).

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

155342140 is a wasteful number, since it uses less digits than its factorization.

155342140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7767116 (or 7767114 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 155342140 is about 12463.6326967702. The cubic root of 155342140 is about 537.5634855606.

Adding to 155342140 its reverse (41243551), we get a palindrome (196585691).

The spelling of 155342140 in words is "one hundred fifty-five million, three hundred forty-two thousand, one hundred forty".