155003240 has 32 divisors (see below), whose sum is σ = 398580480. Its totient is φ = 53143872.

The previous prime is 155003239. The next prime is 155003267. The reversal of 155003240 is 42300551.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276512 + ... + 277071.

It is an arithmetic number, because the mean of its divisors is an integer number (12455640).

Almost surely, 2^155003240 is an apocalyptic number.

155003240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155003240 is an abundant number, since it is smaller than the sum of its proper divisors (243577240).

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

155003240 is a wasteful number, since it uses less digits than its factorization.

155003240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553601 (or 553597 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 155003240 is about 12450.0297188400. The cubic root of 155003240 is about 537.1722783201.

Adding to 155003240 its reverse (42300551), we get a palindrome (197303791).

The spelling of 155003240 in words is "one hundred fifty-five million, three thousand, two hundred forty".