45213640 has 64 divisors (see below), whose sum is σ = 105557760. Its totient is φ = 17418240.

The previous prime is 45213631. The next prime is 45213689. The reversal of 45213640 is 4631254.

45213640 = T₃₃₁ + T₃₃₂ + ... + T₆₇₄.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166705 + ... + 166975.

It is an arithmetic number, because the mean of its divisors is an integer number (1649340).

Almost surely, 2^45213640 is an apocalyptic number.

45213640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45213640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52778880).

45213640 is an abundant number, since it is smaller than the sum of its proper divisors (60344120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45213640 is a wasteful number, since it uses less digits than its factorization.

45213640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 45213640 is about 6724.1088628903. The cubic root of 45213640 is about 356.2513269675.

Adding to 45213640 its reverse (4631254), we get a palindrome (49844894).

The spelling of 45213640 in words is "forty-five million, two hundred thirteen thousand, six hundred forty".