155244004 has 6 divisors (see below), whose sum is σ = 271677014. Its totient is φ = 77622000.

The previous prime is 155243993. The next prime is 155244007. The reversal of 155244004 is 400442551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 132204004 + 23040000 = 11498^2 + 4800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155244004.

It is not an unprimeable number, because it can be changed into a prime (155244007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19405497 + ... + 19405504.

Almost surely, 2^155244004 is an apocalyptic number.

It is an amenable number.

155244004 is a deficient number, since it is larger than the sum of its proper divisors (116433010).

155244004 is a wasteful number, since it uses less digits than its factorization.

155244004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38811005 (or 38811003 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 155244004 is about 12459.6951808622. The cubic root of 155244004 is about 537.4502614152.

Adding to 155244004 its reverse (400442551), we get a palindrome (555686555).

The spelling of 155244004 in words is "one hundred fifty-five million, two hundred forty-four thousand, four".