155513240 has 16 divisors (see below), whose sum is σ = 349904880. Its totient is φ = 62205280.

The previous prime is 155513219. The next prime is 155513269. The reversal of 155513240 is 42315551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943876 + ... + 1943955.

It is an arithmetic number, because the mean of its divisors is an integer number (21869055).

Almost surely, 2^155513240 is an apocalyptic number.

155513240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155513240 is an abundant number, since it is smaller than the sum of its proper divisors (194391640).

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

155513240 is a wasteful number, since it uses less digits than its factorization.

155513240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887842 (or 3887838 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 155513240 is about 12470.4947776742. The cubic root of 155513240 is about 537.7607777311.

Adding to 155513240 its reverse (42315551), we get a palindrome (197828791).

The spelling of 155513240 in words is "one hundred fifty-five million, five hundred thirteen thousand, two hundred forty".