155224401 has 16 divisors (see below), whose sum is σ = 221235840. Its totient is φ = 96567680.

The previous prime is 155224387. The next prime is 155224417. The reversal of 155224401 is 104422551.

It is a cyclic number.

It is not a de Polignac number, because 155224401 - 2¹³ = 155216209 is a prime.

It is a super-2 number, since 2×155224401² = 48189229331617602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155224451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24606 + ... + 30263.

It is an arithmetic number, because the mean of its divisors is an integer number (13827240).

Almost surely, 2^155224401 is an apocalyptic number.

It is an amenable number.

155224401 is a deficient number, since it is larger than the sum of its proper divisors (66011439).

155224401 is a wasteful number, since it uses less digits than its factorization.

155224401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54936.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 155224401 is about 12458.9084995436. The cubic root of 155224401 is about 537.4276387895.

Adding to 155224401 its reverse (104422551), we get a palindrome (259646952).

The spelling of 155224401 in words is "one hundred fifty-five million, two hundred twenty-four thousand, four hundred one".