45513551 has 4 divisors (see below), whose sum is σ = 45537504. Its totient is φ = 45489600.

The previous prime is 45513541. The next prime is 45513553. The reversal of 45513551 is 15531554.

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-45513551 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 (45513553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8855 + ... + 13016.

It is an arithmetic number, because the mean of its divisors is an integer number (11384376).

Almost surely, 2^45513551 is an apocalyptic number.

45513551 is a deficient number, since it is larger than the sum of its proper divisors (23953).

45513551 is a wasteful number, since it uses less digits than its factorization.

45513551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23952.

The product of its digits is 7500, while the sum is 29.

The square root of 45513551 is about 6746.3731737875. The cubic root of 45513551 is about 357.0372868387.

It can be divided in two parts, 45513 and 551, that added together give a palindrome (46064).

The spelling of 45513551 in words is "forty-five million, five hundred thirteen thousand, five hundred fifty-one".