1550431604 has 6 divisors (see below), whose sum is σ = 2713255314. Its totient is φ = 775215800.

The previous prime is 1550431577. The next prime is 1550431639. The reversal of 1550431604 is 4061340551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1428991204 + 121440400 = 37802^2 + 11020^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 193803947 + ... + 193803954.

It is an arithmetic number, because the mean of its divisors is an integer number (452209219).

Almost surely, 2^1550431604 is an apocalyptic number.

It is an amenable number.

1550431604 is a deficient number, since it is larger than the sum of its proper divisors (1162823710).

1550431604 is a wasteful number, since it uses less digits than its factorization.

1550431604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387607905 (or 387607903 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1550431604 is about 39375.5203648155. The cubic root of 1550431604 is about 1157.4019351323.

The spelling of 1550431604 in words is "one billion, five hundred fifty million, four hundred thirty-one thousand, six hundred four".