45211515551 has 4 divisors (see below), whose sum is σ = 45221858712. Its totient is φ = 45201172392.

The previous prime is 45211515469. The next prime is 45211515577. The reversal of 45211515551 is 15551511254.

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

It is a cyclic number.

It is not a de Polignac number, because 45211515551 - 2¹⁰ = 45211514527 is a prime.

It is a super-2 number, since 2×45211515551² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45211511551) 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, 5165021 + ... + 5173766.

It is an arithmetic number, because the mean of its divisors is an integer number (11305464678).

Almost surely, 2^45211515551 is an apocalyptic number.

45211515551 is a deficient number, since it is larger than the sum of its proper divisors (10343161).

45211515551 is a wasteful number, since it uses less digits than its factorization.

45211515551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10343160.

The product of its digits is 25000, while the sum is 35.

The spelling of 45211515551 in words is "forty-five billion, two hundred eleven million, five hundred fifteen thousand, five hundred fifty-one".