84213545 has 12 divisors (see below), whose sum is σ = 109428876. Its totient is φ = 62187840.

The previous prime is 84213539. The next prime is 84213551. The reversal of 84213545 is 54531248.

It is an interprime number because it is at equal distance from previous prime (84213539) and next prime (84213551).

It can be written as a sum of positive squares in 6 ways, for example, as 15389929 + 68823616 = 3923^2 + 8296^2 .

It is not a de Polignac number, because 84213545 - 2¹⁰ = 84212521 is a prime.

It is a super-2 number, since 2×84213545² = 14183842322934050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48986 + ... + 50675.

It is an arithmetic number, because the mean of its divisors is an integer number (9119073).

Almost surely, 2^84213545 is an apocalyptic number.

It is an amenable number.

84213545 is a deficient number, since it is larger than the sum of its proper divisors (25215331).

84213545 is a wasteful number, since it uses less digits than its factorization.

84213545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99692 (or 99679 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 84213545 is about 9176.7938300912. The cubic root of 84213545 is about 438.3227207436.

The spelling of 84213545 in words is "eighty-four million, two hundred thirteen thousand, five hundred forty-five".