155311040 has 28 divisors (see below), whose sum is σ = 369835176. Its totient is φ = 62124288.

The previous prime is 155311027. The next prime is 155311049. The reversal of 155311040 is 40113551.

155311040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155311049) 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, 242354 + ... + 242993.

Almost surely, 2^155311040 is an apocalyptic number.

155311040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155311040 is an abundant number, since it is smaller than the sum of its proper divisors (214524136).

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

155311040 is an equidigital number, since it uses as much as digits as its factorization.

155311040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485364 (or 485354 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 155311040 is about 12462.3850044845. The cubic root of 155311040 is about 537.5276091821.

Adding to 155311040 its reverse (40113551), we get a palindrome (195424591).

The spelling of 155311040 in words is "one hundred fifty-five million, three hundred eleven thousand, forty".