45219081 has 16 divisors (see below), whose sum is σ = 63212544. Its totient is φ = 28698384.

The previous prime is 45219079. The next prime is 45219113. The reversal of 45219081 is 18091254.

It is a happy number.

It is not a de Polignac number, because 45219081 - 2¹ = 45219079 is a prime.

It is a super-2 number, since 2×45219081² = 4089530572969122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45219001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14220 + ... + 17106.

It is an arithmetic number, because the mean of its divisors is an integer number (3950784).

Almost surely, 2^45219081 is an apocalyptic number.

It is an amenable number.

45219081 is a deficient number, since it is larger than the sum of its proper divisors (17993463).

45219081 is a wasteful number, since it uses less digits than its factorization.

45219081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 45219081 is about 6724.5134396475. The cubic root of 45219081 is about 356.2656167977.

The spelling of 45219081 in words is "forty-five million, two hundred nineteen thousand, eighty-one".