155543401 has 4 divisors (see below), whose sum is σ = 167508292. Its totient is φ = 143578512.

The previous prime is 155543371. The next prime is 155543413. The reversal of 155543401 is 104345551.

155543401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107101801 + 48441600 = 10349^2 + 6960^2 .

It is a cyclic number.

It is not a de Polignac number, because 155543401 - 2¹³ = 155535209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155543401.

It is not an unprimeable number, because it can be changed into a prime (155543471) 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, 5982426 + ... + 5982451.

It is an arithmetic number, because the mean of its divisors is an integer number (41877073).

Almost surely, 2^155543401 is an apocalyptic number.

It is an amenable number.

155543401 is a deficient number, since it is larger than the sum of its proper divisors (11964891).

155543401 is a wasteful number, since it uses less digits than its factorization.

155543401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11964890.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 155543401 is about 12471.7040134859. The cubic root of 155543401 is about 537.7955408042.

Adding to 155543401 its reverse (104345551), we get a palindrome (259888952).

The spelling of 155543401 in words is "one hundred fifty-five million, five hundred forty-three thousand, four hundred one".