88471821 has 4 divisors (see below), whose sum is σ = 117962432. Its totient is φ = 58981212.

The previous prime is 88471819. The next prime is 88471853. The reversal of 88471821 is 12817488.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 88471821 - 2¹ = 88471819 is a prime.

It is a super-2 number, since 2×88471821² = 15654526222112082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 88471821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88471811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14745301 + ... + 14745306.

It is an arithmetic number, because the mean of its divisors is an integer number (29490608).

Almost surely, 2^88471821 is an apocalyptic number.

It is an amenable number.

88471821 is a deficient number, since it is larger than the sum of its proper divisors (29490611).

88471821 is a wasteful number, since it uses less digits than its factorization.

88471821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29490610.

The product of its digits is 28672, while the sum is 39.

The square root of 88471821 is about 9405.9460449229. The cubic root of 88471821 is about 445.5895413942.

The spelling of 88471821 in words is "eighty-eight million, four hundred seventy-one thousand, eight hundred twenty-one".