221153031 has 48 divisors (see below), whose sum is σ = 363462400. Its totient is φ = 132794640.

The previous prime is 221153029. The next prime is 221153041. The reversal of 221153031 is 130351122.

221153031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221153031 - 2¹ = 221153029 is a prime.

It is a super-2 number, since 2×221153031² = 97817326240973922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221152995 and 221153013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221153041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 453870 + ... + 454356.

Almost surely, 2^221153031 is an apocalyptic number.

221153031 is a deficient number, since it is larger than the sum of its proper divisors (142309369).

221153031 is a wasteful number, since it uses less digits than its factorization.

221153031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 221153031 is about 14871.2148461382. The cubic root of 221153031 is about 604.7338774477.

The spelling of 221153031 in words is "two hundred twenty-one million, one hundred fifty-three thousand, thirty-one".