45621019 has 2 divisors, whose sum is σ = 45621020. Its totient is φ = 45621018.

The previous prime is 45621011. The next prime is 45621049. The reversal of 45621019 is 91012654.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45621019 - 2³ = 45621011 is a prime.

It is a super-2 number, since 2×45621019² = 4162554749196722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (45621011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22810509 + 22810510.

It is an arithmetic number, because the mean of its divisors is an integer number (22810510).

Almost surely, 2^45621019 is an apocalyptic number.

45621019 is a deficient number, since it is larger than the sum of its proper divisors (1).

45621019 is an equidigital number, since it uses as much as digits as its factorization.

45621019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 45621019 is about 6754.3333497837. Note that the first 4 decimals coincide. The cubic root of 45621019 is about 357.3180817642.

The spelling of 45621019 in words is "forty-five million, six hundred twenty-one thousand, nineteen".