155105401 has 8 divisors (see below), whose sum is σ = 172399104. Its totient is φ = 138343920.

The previous prime is 155105387. The next prime is 155105413. The reversal of 155105401 is 104501551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155105401 - 2¹¹ = 155103353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155105471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132441 + ... + 133606.

It is an arithmetic number, because the mean of its divisors is an integer number (21549888).

Almost surely, 2^155105401 is an apocalyptic number.

155105401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155105401 is a deficient number, since it is larger than the sum of its proper divisors (17293703).

155105401 is a wasteful number, since it uses less digits than its factorization.

155105401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266111.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 155105401 is about 12454.1318846397. The cubic root of 155105401 is about 537.2902672624.

Adding to 155105401 its reverse (104501551), we get a palindrome (259606952).

The spelling of 155105401 in words is "one hundred fifty-five million, one hundred five thousand, four hundred one".