1553521141 has 4 divisors (see below), whose sum is σ = 1554905632. Its totient is φ = 1552136652.

The previous prime is 1553521133. The next prime is 1553521159. The reversal of 1553521141 is 1411253551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1411253551 = 79 ⋅17863969.

It is a cyclic number.

It is not a de Polignac number, because 1553521141 - 2³ = 1553521133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553521121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690561 + ... + 692806.

It is an arithmetic number, because the mean of its divisors is an integer number (388726408).

Almost surely, 2^1553521141 is an apocalyptic number.

It is an amenable number.

1553521141 is a deficient number, since it is larger than the sum of its proper divisors (1384491).

1553521141 is a wasteful number, since it uses less digits than its factorization.

1553521141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384490.

The product of its digits is 3000, while the sum is 28.

The square root of 1553521141 is about 39414.7325374662. The cubic root of 1553521141 is about 1158.1702079874.

Adding to 1553521141 its reverse (1411253551), we get a palindrome (2964774692).

The spelling of 1553521141 in words is "one billion, five hundred fifty-three million, five hundred twenty-one thousand, one hundred forty-one".