1553440132 has 24 divisors (see below), whose sum is σ = 2812705280. Its totient is φ = 749926080.

The previous prime is 1553440081. The next prime is 1553440139. The reversal of 1553440132 is 2310443551.

It is a self number, because there is not a number n which added to its sum of digits gives 1553440132.

It is not an unprimeable number, because it can be changed into a prime (1553440139) 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, 40168 + ... + 68704.

Almost surely, 2^1553440132 is an apocalyptic number.

It is an amenable number.

1553440132 is a deficient number, since it is larger than the sum of its proper divisors (1259265148).

1553440132 is a wasteful number, since it uses less digits than its factorization.

1553440132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29011 (or 29009 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1553440132 is about 39413.7048753349. The cubic root of 1553440132 is about 1158.1500765499.

Adding to 1553440132 its reverse (2310443551), we get a palindrome (3863883683).

The spelling of 1553440132 in words is "one billion, five hundred fifty-three million, four hundred forty thousand, one hundred thirty-two".