5451999533 has 4 divisors (see below), whose sum is σ = 5456495388. Its totient is φ = 5447503680.

The previous prime is 5451999523. The next prime is 5451999571. The reversal of 5451999533 is 3359991545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3359991545 = 5 ⋅671998309.

It can be written as a sum of positive squares in 2 ways, for example, as 425473129 + 5026526404 = 20627^2 + 70898^2 .

It is a cyclic number.

It is not a de Polignac number, because 5451999533 - 2⁸ = 5451999277 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 (5451999523) 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, 2246108 + ... + 2248533.

It is an arithmetic number, because the mean of its divisors is an integer number (1364123847).

Almost surely, 2^5451999533 is an apocalyptic number.

It is an amenable number.

5451999533 is a deficient number, since it is larger than the sum of its proper divisors (4495855).

5451999533 is a wasteful number, since it uses less digits than its factorization.

5451999533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4495854.

The product of its digits is 3280500, while the sum is 53.

The square root of 5451999533 is about 73837.6566055559. The cubic root of 5451999533 is about 1760.0240541005.

The spelling of 5451999533 in words is "five billion, four hundred fifty-one million, nine hundred ninety-nine thousand, five hundred thirty-three".