15551053541 has 4 divisors (see below), whose sum is σ = 15747902400. Its totient is φ = 15354204684.

The previous prime is 15551053523. The next prime is 15551053547. The reversal of 15551053541 is 14535015551.

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: 14535015551 = 7 ⋅2076430793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15551053541 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 (15551053547) 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, 98424311 + ... + 98424468.

It is an arithmetic number, because the mean of its divisors is an integer number (3936975600).

Almost surely, 2^15551053541 is an apocalyptic number.

It is an amenable number.

15551053541 is a deficient number, since it is larger than the sum of its proper divisors (196848859).

15551053541 is an equidigital number, since it uses as much as digits as its factorization.

15551053541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196848858.

The product of its (nonzero) digits is 37500, while the sum is 35.

The spelling of 15551053541 in words is "fifteen billion, five hundred fifty-one million, fifty-three thousand, five hundred forty-one".