155314440 has 48 divisors (see below), whose sum is σ = 504773100. Its totient is φ = 41417088.

The previous prime is 155314403. The next prime is 155314457. The reversal of 155314440 is 44413551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 155301444 + 12996 = 12462^2 + 114^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215355 + ... + 216074.

Almost surely, 2^155314440 is an apocalyptic number.

155314440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155314440 is an abundant number, since it is smaller than the sum of its proper divisors (349458660).

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

155314440 is a wasteful number, since it uses less digits than its factorization.

155314440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431446 (or 431439 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 155314440 is about 12462.5214142243. The cubic root of 155314440 is about 537.5315315917.

Adding to 155314440 its reverse (44413551), we get a palindrome (199727991).

The spelling of 155314440 in words is "one hundred fifty-five million, three hundred fourteen thousand, four hundred forty".