155420799 has 8 divisors (see below), whose sum is σ = 207459840. Its totient is φ = 103497816.

The previous prime is 155420767. The next prime is 155420801. The reversal of 155420799 is 997024551.

155420799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 155420799 - 2⁵ = 155420767 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 155420799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155420999) 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, 25839 + ... + 31280.

It is an arithmetic number, because the mean of its divisors is an integer number (25932480).

Almost surely, 2^155420799 is an apocalyptic number.

155420799 is a deficient number, since it is larger than the sum of its proper divisors (52039041).

155420799 is an equidigital number, since it uses as much as digits as its factorization.

155420799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58029.

The product of its (nonzero) digits is 113400, while the sum is 42.

The square root of 155420799 is about 12466.7878380921. The cubic root of 155420799 is about 537.6542037461.

The spelling of 155420799 in words is "one hundred fifty-five million, four hundred twenty thousand, seven hundred ninety-nine".