1550504140 has 24 divisors (see below), whose sum is σ = 3368337840. Its totient is φ = 598815168.

The previous prime is 1550504117. The next prime is 1550504143. The reversal of 1550504140 is 414050551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1550504143) 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, 1336062 + ... + 1337221.

It is an arithmetic number, because the mean of its divisors is an integer number (140347410).

Almost surely, 2^1550504140 is an apocalyptic number.

1550504140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550504140 is an abundant number, since it is smaller than the sum of its proper divisors (1817833700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1550504140 is a wasteful number, since it uses less digits than its factorization.

1550504140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673321 (or 2673319 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1550504140 is about 39376.4414339336. The cubic root of 1550504140 is about 1157.4199842994.

Adding to 1550504140 its reverse (414050551), we get a palindrome (1964554691).

The spelling of 1550504140 in words is "one billion, five hundred fifty million, five hundred four thousand, one hundred forty".