155055431 has 8 divisors (see below), whose sum is σ = 162601680. Its totient is φ = 147655872.

The previous prime is 155055421. The next prime is 155055437. The reversal of 155055431 is 134550551.

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

It is a cyclic number.

It is not a de Polignac number, because 155055431 - 2¹⁰ = 155054407 is a prime.

It is a super-2 number, since 2×155055431² = 48084373365191522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155055394 and 155055403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155055437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34505 + ... + 38738.

It is an arithmetic number, because the mean of its divisors is an integer number (20325210).

Almost surely, 2^155055431 is an apocalyptic number.

155055431 is a deficient number, since it is larger than the sum of its proper divisors (7546249).

155055431 is an equidigital number, since it uses as much as digits as its factorization.

155055431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73345.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 155055431 is about 12452.1255615256. The cubic root of 155055431 is about 537.2325618178.

The spelling of 155055431 in words is "one hundred fifty-five million, fifty-five thousand, four hundred thirty-one".