155247540 has 48 divisors (see below), whose sum is σ = 496793472. Its totient is φ = 35485056.

The previous prime is 155247517. The next prime is 155247541. The reversal of 155247540 is 45742551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155247541) 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, 184399 + ... + 185238.

It is an arithmetic number, because the mean of its divisors is an integer number (10349864).

Almost surely, 2^155247540 is an apocalyptic number.

155247540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155247540 is an abundant number, since it is smaller than the sum of its proper divisors (341545932).

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

155247540 is a wasteful number, since it uses less digits than its factorization.

155247540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369656 (or 369654 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 155247540 is about 12459.8370775865. The cubic root of 155247540 is about 537.4543418942.

The spelling of 155247540 in words is "one hundred fifty-five million, two hundred forty-seven thousand, five hundred forty".