76221901 has 36 divisors (see below), whose sum is σ = 97292160. Its totient is φ = 59466960.

The previous prime is 76221883. The next prime is 76221907. The reversal of 76221901 is 10912267.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-76221901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76221901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76221907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 548290 + ... + 548428.

It is an arithmetic number, because the mean of its divisors is an integer number (2702560).

Almost surely, 2^76221901 is an apocalyptic number.

It is an amenable number.

76221901 is a deficient number, since it is larger than the sum of its proper divisors (21070259).

76221901 is a wasteful number, since it uses less digits than its factorization.

76221901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 76221901 is about 8730.5155059710. The cubic root of 76221901 is about 423.9942093816.

The spelling of 76221901 in words is "seventy-six million, two hundred twenty-one thousand, nine hundred one".