45519919 has 2 divisors, whose sum is σ = 45519920. Its totient is φ = 45519918.

The previous prime is 45519913. The next prime is 45519941. The reversal of 45519919 is 91991554.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45519919 - 2¹⁹ = 44995631 is a prime.

It is a super-2 number, since 2×45519919² = 4144126051533122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45519913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22759959 + 22759960.

It is an arithmetic number, because the mean of its divisors is an integer number (22759960).

Almost surely, 2^45519919 is an apocalyptic number.

45519919 is a deficient number, since it is larger than the sum of its proper divisors (1).

45519919 is an equidigital number, since it uses as much as digits as its factorization.

45519919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 43.

The square root of 45519919 is about 6746.8451145702. The cubic root of 45519919 is about 357.0539376117.

The spelling of 45519919 in words is "forty-five million, five hundred nineteen thousand, nine hundred nineteen".