155312340 has 48 divisors (see below), whose sum is σ = 460458432. Its totient is φ = 38980096.

The previous prime is 155312317. The next prime is 155312359. The reversal of 155312340 is 43213551.

It is a self number, because there is not a number n which added to its sum of digits gives 155312340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75114 + ... + 77153.

It is an arithmetic number, because the mean of its divisors is an integer number (9592884).

Almost surely, 2^155312340 is an apocalyptic number.

155312340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155312340 is an abundant number, since it is smaller than the sum of its proper divisors (305146092).

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

155312340 is a wasteful number, since it uses less digits than its factorization.

155312340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152296 (or 152294 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 155312340 is about 12462.4371613260. The cubic root of 155312340 is about 537.5291089337.

Adding to 155312340 its reverse (43213551), we get a palindrome (198525891).

It can be divided in two parts, 15531 and 2340, that added together give a palindrome (17871).

The spelling of 155312340 in words is "one hundred fifty-five million, three hundred twelve thousand, three hundred forty".