88261021 has 4 divisors (see below), whose sum is σ = 90646492. Its totient is φ = 85875552.

The previous prime is 88260941. The next prime is 88261031. The reversal of 88261021 is 12016288.

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 81180100 + 7080921 = 9010^2 + 2661^2 .

It is a cyclic number.

It is not a de Polignac number, because 88261021 - 2¹⁷ = 88129949 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 (88261031) 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, 1192680 + ... + 1192753.

It is an arithmetic number, because the mean of its divisors is an integer number (22661623).

Almost surely, 2^88261021 is an apocalyptic number.

It is an amenable number.

88261021 is a deficient number, since it is larger than the sum of its proper divisors (2385471).

88261021 is a wasteful number, since it uses less digits than its factorization.

88261021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385470.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 88261021 is about 9394.7336843574. The cubic root of 88261021 is about 445.2353609140.

The spelling of 88261021 in words is "eighty-eight million, two hundred sixty-one thousand, twenty-one".