1553252524421 has 4 divisors (see below), whose sum is σ = 1672733487852. Its totient is φ = 1433771560992.

The previous prime is 1553252524403. The next prime is 1553252524429. The reversal of 1553252524421 is 1244252523551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 705037312225 + 848215212196 = 839665^2 + 920986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1553252524421 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 (1553252524429) 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, 59740481696 + ... + 59740481721.

It is an arithmetic number, because the mean of its divisors is an integer number (418183371963).

Almost surely, 2^{1553252524421} is an apocalyptic number.

It is an amenable number.

1553252524421 is a deficient number, since it is larger than the sum of its proper divisors (119480963431).

1553252524421 is a wasteful number, since it uses less digits than its factorization.

1553252524421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119480963430.

The product of its digits is 480000, while the sum is 41.

The spelling of 1553252524421 in words is "one trillion, five hundred fifty-three billion, two hundred fifty-two million, five hundred twenty-four thousand, four hundred twenty-one".