43253215651 has 16 divisors (see below), whose sum is σ = 47286961920. Its totient is φ = 39385635840.

The previous prime is 43253215609. The next prime is 43253215693. The reversal of 43253215651 is 15651235234.

It is an interprime number because it is at equal distance from previous prime (43253215609) and next prime (43253215693).

It is a cyclic number.

It is not a de Polignac number, because 43253215651 - 2¹¹ = 43253213603 is a prime.

It is a super-2 number, since 2×43253215651² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43253215651.

It is not an unprimeable number, because it can be changed into a prime (43253255651) 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, 2726695 + ... + 2742511.

It is an arithmetic number, because the mean of its divisors is an integer number (2955435120).

Almost surely, 2^43253215651 is an apocalyptic number.

43253215651 is a deficient number, since it is larger than the sum of its proper divisors (4033746269).

43253215651 is a wasteful number, since it uses less digits than its factorization.

43253215651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054.

The product of its digits is 108000, while the sum is 37.

The spelling of 43253215651 in words is "forty-three billion, two hundred fifty-three million, two hundred fifteen thousand, six hundred fifty-one".