221157010 has 8 divisors (see below), whose sum is σ = 398082636. Its totient is φ = 88462800.

The previous prime is 221156989. The next prime is 221157011. The reversal of 221157010 is 10751122.

221157010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 180821809 + 40335201 = 13447^2 + 6351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (221157011) 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, 11057841 + ... + 11057860.

Almost surely, 2^221157010 is an apocalyptic number.

221157010 is a deficient number, since it is larger than the sum of its proper divisors (176925626).

221157010 is a wasteful number, since it uses less digits than its factorization.

221157010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22115708.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 221157010 is about 14871.3486274783. The cubic root of 221157010 is about 604.7375042299.

The spelling of 221157010 in words is "two hundred twenty-one million, one hundred fifty-seven thousand, ten".