5451121551 has 4 divisors (see below), whose sum is σ = 7268162072. Its totient is φ = 3634081032.

The previous prime is 5451121549. The next prime is 5451121579. The reversal of 5451121551 is 1551211545.

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

It is not a de Polignac number, because 5451121551 - 2¹ = 5451121549 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 (5451121531) 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, 908520256 + ... + 908520261.

It is an arithmetic number, because the mean of its divisors is an integer number (1817040518).

Almost surely, 2^5451121551 is an apocalyptic number.

5451121551 is a deficient number, since it is larger than the sum of its proper divisors (1817040521).

5451121551 is a wasteful number, since it uses less digits than its factorization.

5451121551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817040520.

The product of its digits is 5000, while the sum is 30.

The square root of 5451121551 is about 73831.7110122744. The cubic root of 5451121551 is about 1759.9295717987.

The spelling of 5451121551 in words is "five billion, four hundred fifty-one million, one hundred twenty-one thousand, five hundred fifty-one".