45120431 has 4 divisors (see below), whose sum is σ = 47774592. Its totient is φ = 42466272.

The previous prime is 45120409. The next prime is 45120443. The reversal of 45120431 is 13402154.

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

It is not a de Polignac number, because 45120431 - 2¹⁸ = 44858287 is a prime.

It is a super-2 number, since 2×45120431² = 4071706587251522, which 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 (45120401) 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, 1327055 + ... + 1327088.

It is an arithmetic number, because the mean of its divisors is an integer number (11943648).

Almost surely, 2^45120431 is an apocalyptic number.

45120431 is a deficient number, since it is larger than the sum of its proper divisors (2654161).

45120431 is a wasteful number, since it uses less digits than its factorization.

45120431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654160.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 45120431 is about 6717.1743315177. The cubic root of 45120431 is about 356.0063516731.

Adding to 45120431 its reverse (13402154), we get a palindrome (58522585).

The spelling of 45120431 in words is "forty-five million, one hundred twenty thousand, four hundred thirty-one".