45511151021 has 4 divisors (see below), whose sum is σ = 52012744032. Its totient is φ = 39009558012.

The previous prime is 45511150991. The next prime is 45511151047. The reversal of 45511151021 is 12015111554.

It is a happy number.

45511151021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 45511151021 - 2³⁰ = 44437409197 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 (45511141021) 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, 3250796495 + ... + 3250796508.

It is an arithmetic number, because the mean of its divisors is an integer number (13003186008).

Almost surely, 2^45511151021 is an apocalyptic number.

It is an amenable number.

45511151021 is a deficient number, since it is larger than the sum of its proper divisors (6501593011).

45511151021 is an equidigital number, since it uses as much as digits as its factorization.

45511151021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501593010.

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 45511151021 its reverse (12015111554), we get a palindrome (57526262575).

The spelling of 45511151021 in words is "forty-five billion, five hundred eleven million, one hundred fifty-one thousand, twenty-one".