76230021 has 16 divisors (see below), whose sum is σ = 116284928. Its totient is φ = 43513200.

The previous prime is 76229999. The next prime is 76230041. The reversal of 76230021 is 12003267.

It is a happy number.

It is not a de Polignac number, because 76230021 - 2¹¹ = 76227973 is a prime.

It is a super-2 number, since 2×76230021² = 11622032203320882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 76230021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76230041) 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, 30966 + ... + 33336.

It is an arithmetic number, because the mean of its divisors is an integer number (7267808).

Almost surely, 2^76230021 is an apocalyptic number.

It is an amenable number.

76230021 is a deficient number, since it is larger than the sum of its proper divisors (40054907).

76230021 is a wasteful number, since it uses less digits than its factorization.

76230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 76230021 is about 8730.9805291273. The cubic root of 76230021 is about 424.0092650313.

Adding to 76230021 its reverse (12003267), we get a palindrome (88233288).

The spelling of 76230021 in words is "seventy-six million, two hundred thirty thousand, twenty-one".