45215491 has 2 divisors, whose sum is σ = 45215492. Its totient is φ = 45215490.

The previous prime is 45215479. The next prime is 45215503. The reversal of 45215491 is 19451254.

It is a balanced prime because it is at equal distance from previous prime (45215479) and next prime (45215503).

It is a cyclic number.

It is not a de Polignac number, because 45215491 - 2¹⁷ = 45084419 is a prime.

It is not a weakly prime, because it can be changed into another prime (45215411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22607745 + 22607746.

It is an arithmetic number, because the mean of its divisors is an integer number (22607746).

Almost surely, 2^45215491 is an apocalyptic number.

45215491 is a deficient number, since it is larger than the sum of its proper divisors (1).

45215491 is an equidigital number, since it uses as much as digits as its factorization.

45215491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 45215491 is about 6724.2465005382. The cubic root of 45215491 is about 356.2561884223.

The spelling of 45215491 in words is "forty-five million, two hundred fifteen thousand, four hundred ninety-one".