45555551 has 8 divisors (see below), whose sum is σ = 46872000. Its totient is φ = 44248960.

The previous prime is 45555509. The next prime is 45555553. The reversal of 45555551 is 15555554.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45555551 - 2⁶ = 45555487 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 (45555553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7475 + ... + 12123.

It is an arithmetic number, because the mean of its divisors is an integer number (5859000).

Almost surely, 2^45555551 is an apocalyptic number.

45555551 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

45555551 is a deficient number, since it is larger than the sum of its proper divisors (1316449).

45555551 is a wasteful number, since it uses less digits than its factorization.

45555551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929.

The product of its digits is 62500, while the sum is 35.

The square root of 45555551 is about 6749.4852396312. The cubic root of 45555551 is about 357.1470779920.

It can be divided in two parts, 4 and 5555551, that added together give a palindrome (5555555).

The spelling of 45555551 in words is "forty-five million, five hundred fifty-five thousand, five hundred fifty-one".