88451621 has 4 divisors (see below), whose sum is σ = 88900812. Its totient is φ = 88002432.

The previous prime is 88451617. The next prime is 88451641. The reversal of 88451621 is 12615488.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63840100 + 24611521 = 7990^2 + 4961^2 .

It is a cyclic number.

It is not a de Polignac number, because 88451621 - 2² = 88451617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88451611) 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, 224300 + ... + 224693.

It is an arithmetic number, because the mean of its divisors is an integer number (22225203).

Almost surely, 2^88451621 is an apocalyptic number.

It is an amenable number.

88451621 is a deficient number, since it is larger than the sum of its proper divisors (449191).

88451621 is a wasteful number, since it uses less digits than its factorization.

88451621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449190.

The product of its digits is 15360, while the sum is 35.

The square root of 88451621 is about 9404.8721947722. The cubic root of 88451621 is about 445.5556262871. Note that the first 3 decimals are identical.

The spelling of 88451621 in words is "eighty-eight million, four hundred fifty-one thousand, six hundred twenty-one".