155401344 has 144 divisors (see below), whose sum is σ = 520382070. Its totient is φ = 44384256.

The previous prime is 155401333. The next prime is 155401381. The reversal of 155401344 is 443104551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 98247744 + 57153600 = 9912^2 + 7560^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 55072 + ... + 57824.

Almost surely, 2^155401344 is an apocalyptic number.

155401344 is a gapful number since it is divisible by the number (14) 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 155401344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260191035).

155401344 is an abundant number, since it is smaller than the sum of its proper divisors (364980726).

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

155401344 is a wasteful number, since it uses less digits than its factorization.

155401344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787 (or 2765 counting only the distinct ones).

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

The square root of 155401344 is about 12466.0075405079. The cubic root of 155401344 is about 537.6317689559.

Adding to 155401344 its reverse (443104551), we get a palindrome (598505895).

The spelling of 155401344 in words is "one hundred fifty-five million, four hundred one thousand, three hundred forty-four".