1550231878 has 16 divisors (see below), whose sum is σ = 2613100896. Its totient is φ = 684383040.

The previous prime is 1550231873. The next prime is 1550231897. The reversal of 1550231878 is 8781320551.

It is a self number, because there is not a number n which added to its sum of digits gives 1550231878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550231873) 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, 1295583 + ... + 1296778.

It is an arithmetic number, because the mean of its divisors is an integer number (163318806).

Almost surely, 2^1550231878 is an apocalyptic number.

1550231878 is a deficient number, since it is larger than the sum of its proper divisors (1062869018).

1550231878 is a wasteful number, since it uses less digits than its factorization.

1550231878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592399.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 1550231878 is about 39372.9841134756. The cubic root of 1550231878 is about 1157.3522343081.

The spelling of 1550231878 in words is "one billion, five hundred fifty million, two hundred thirty-one thousand, eight hundred seventy-eight".