219194031 has 16 divisors (see below), whose sum is σ = 343038464. Its totient is φ = 121868064.

The previous prime is 219194029. The next prime is 219194057. The reversal of 219194031 is 130491912.

It is not a de Polignac number, because 219194031 - 2¹ = 219194029 is a prime.

It is a super-2 number, since 2×219194031² = 96092046452057922, which contains 22 as substring.

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 219194031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219194011) 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 15 ways as a sum of consecutive naturals, for example, 140275 + ... + 141828.

It is an arithmetic number, because the mean of its divisors is an integer number (21439904).

Almost surely, 2^219194031 is an apocalyptic number.

219194031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

219194031 is a deficient number, since it is larger than the sum of its proper divisors (123844433).

219194031 is a wasteful number, since it uses less digits than its factorization.

219194031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282150.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 219194031 is about 14805.2028354900. The cubic root of 219194031 is about 602.9429773173.

The spelling of 219194031 in words is "two hundred nineteen million, one hundred ninety-four thousand, thirty-one".