155422233 has 20 divisors (see below), whose sum is σ = 232552320. Its totient is φ = 103446072.

The previous prime is 155422139. The next prime is 155422249. The reversal of 155422233 is 332224551.

It is a happy number.

155422233 is a `hidden beast` number, since 1 + 5 + 5 + 422 + 233 = 666.

It is not a de Polignac number, because 155422233 - 2²² = 151227929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 155422197 and 155422206.

It is not an unprimeable number, because it can be changed into a prime (155422273) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 66816 + ... + 69102.

It is an arithmetic number, because the mean of its divisors is an integer number (11627616).

Almost surely, 2^155422233 is an apocalyptic number.

It is an amenable number.

155422233 is a deficient number, since it is larger than the sum of its proper divisors (77130087).

155422233 is an equidigital number, since it uses as much as digits as its factorization.

155422233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138 (or 3129 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 155422233 is about 12466.8453507694. The cubic root of 155422233 is about 537.6558573080.

Adding to 155422233 its reverse (332224551), we get a palindrome (487646784).

The spelling of 155422233 in words is "one hundred fifty-five million, four hundred twenty-two thousand, two hundred thirty-three".