5511233551 has 4 divisors (see below), whose sum is σ = 5601581704. Its totient is φ = 5420885400.

The previous prime is 5511233531. The next prime is 5511233593. The reversal of 5511233551 is 1553321155.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5511233551 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 (5511233501) 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, 45173985 + ... + 45174106.

It is an arithmetic number, because the mean of its divisors is an integer number (1400395426).

Almost surely, 2^5511233551 is an apocalyptic number.

5511233551 is a deficient number, since it is larger than the sum of its proper divisors (90348153).

5511233551 is an equidigital number, since it uses as much as digits as its factorization.

5511233551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90348152.

The product of its digits is 11250, while the sum is 31.

The square root of 5511233551 is about 74237.6828234826. The cubic root of 5511233551 is about 1766.3751185243.

The spelling of 5511233551 in words is "five billion, five hundred eleven million, two hundred thirty-three thousand, five hundred fifty-one".