155422004 has 6 divisors (see below), whose sum is σ = 271988514. Its totient is φ = 77711000.

The previous prime is 155421983. The next prime is 155422009. The reversal of 155422004 is 400224551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 146410000 + 9012004 = 12100^2 + 3002^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155422009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19427747 + ... + 19427754.

It is an arithmetic number, because the mean of its divisors is an integer number (45331419).

Almost surely, 2^155422004 is an apocalyptic number.

It is an amenable number.

155422004 is a deficient number, since it is larger than the sum of its proper divisors (116566510).

155422004 is a wasteful number, since it uses less digits than its factorization.

155422004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38855505 (or 38855503 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 155422004 is about 12466.8361664057. The cubic root of 155422004 is about 537.6555932461.

Adding to 155422004 its reverse (400224551), we get a palindrome (555646555).

The spelling of 155422004 in words is "one hundred fifty-five million, four hundred twenty-two thousand, four".