155015240 has 16 divisors (see below), whose sum is σ = 348784380. Its totient is φ = 62006080.

The previous prime is 155015233. The next prime is 155015249. The reversal of 155015240 is 42510551.

It is a happy number.

155015240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 145491844 + 9523396 = 12062^2 + 3086^2 .

It is not an unprimeable number, because it can be changed into a prime (155015249) 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, 1937651 + ... + 1937730.

Almost surely, 2^155015240 is an apocalyptic number.

155015240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155015240 is an abundant number, since it is smaller than the sum of its proper divisors (193769140).

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

155015240 is a wasteful number, since it uses less digits than its factorization.

155015240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875392 (or 3875388 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 155015240 is about 12450.5116360734. The cubic root of 155015240 is about 537.1861401831.

Adding to 155015240 its reverse (42510551), we get a palindrome (197525791).

The spelling of 155015240 in words is "one hundred fifty-five million, fifteen thousand, two hundred forty".