221162901 has 16 divisors (see below), whose sum is σ = 299018304. Its totient is φ = 145387904.

The previous prime is 221162899. The next prime is 221162957. The reversal of 221162901 is 109261122.

It is a cyclic number.

It is not a de Polignac number, because 221162901 - 2¹ = 221162899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221162971) 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, 73315 + ... + 76271.

It is an arithmetic number, because the mean of its divisors is an integer number (18688644).

Almost surely, 2^221162901 is an apocalyptic number.

It is an amenable number.

221162901 is a deficient number, since it is larger than the sum of its proper divisors (77855403).

221162901 is a wasteful number, since it uses less digits than its factorization.

221162901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 221162901 is about 14871.5466915852. The cubic root of 221162901 is about 604.7428736837.

The spelling of 221162901 in words is "two hundred twenty-one million, one hundred sixty-two thousand, nine hundred one".