155334240 has 192 divisors, whose sum is σ = 557565120. Its totient is φ = 40366080.

The previous prime is 155334239. The next prime is 155334247. The reversal of 155334240 is 42433551.

It is a super-2 number, since 2×155334240² = 48257452232755200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155334247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176682 + ... + 177558.

It is an arithmetic number, because the mean of its divisors is an integer number (2903985).

Almost surely, 2^155334240 is an apocalyptic number.

155334240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155334240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278782560).

155334240 is an abundant number, since it is smaller than the sum of its proper divisors (402230880).

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

155334240 is a wasteful number, since it uses less digits than its factorization.

155334240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 155334240 is about 12463.3157706928. The cubic root of 155334240 is about 537.5543727220.

Adding to 155334240 its reverse (42433551), we get a palindrome (197767791).

The spelling of 155334240 in words is "one hundred fifty-five million, three hundred thirty-four thousand, two hundred forty".