1550143240 has 64 divisors (see below), whose sum is σ = 3533492160. Its totient is φ = 611984640.

The previous prime is 1550143229. The next prime is 1550143241. The reversal of 1550143240 is 423410551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1550143241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1595955 + ... + 1596925.

It is an arithmetic number, because the mean of its divisors is an integer number (55210815).

Almost surely, 2^1550143240 is an apocalyptic number.

1550143240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550143240 is an abundant number, since it is smaller than the sum of its proper divisors (1983348920).

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

1550143240 is a wasteful number, since it uses less digits than its factorization.

1550143240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1550143240 is about 39371.8584778519. The cubic root of 1550143240 is about 1157.3301758139.

Adding to 1550143240 its reverse (423410551), we get a palindrome (1973553791).

The spelling of 1550143240 in words is "one billion, five hundred fifty million, one hundred forty-three thousand, two hundred forty".