155450140 has 12 divisors (see below), whose sum is σ = 326445336. Its totient is φ = 62180048.

The previous prime is 155450137. The next prime is 155450149. The reversal of 155450140 is 41054551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155450149) 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, 3886234 + ... + 3886273.

It is an arithmetic number, because the mean of its divisors is an integer number (27203778).

Almost surely, 2^155450140 is an apocalyptic number.

155450140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155450140 is an abundant number, since it is smaller than the sum of its proper divisors (170995196).

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

155450140 is a wasteful number, since it uses less digits than its factorization.

155450140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772516 (or 7772514 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 155450140 is about 12467.9645491957. The cubic root of 155450140 is about 537.6880351669.

The spelling of 155450140 in words is "one hundred fifty-five million, four hundred fifty thousand, one hundred forty".