224891997 has 24 divisors (see below), whose sum is σ = 347504352. Its totient is φ = 128275200.

The previous prime is 224891959. The next prime is 224892007. The reversal of 224891997 is 799198422.

It is not a de Polignac number, because 224891997 - 2¹⁴ = 224875613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224891917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2254 + ... + 21327.

It is an arithmetic number, because the mean of its divisors is an integer number (14479348).

Almost surely, 2^224891997 is an apocalyptic number.

It is an amenable number.

224891997 is a deficient number, since it is larger than the sum of its proper divisors (122612355).

224891997 is a wasteful number, since it uses less digits than its factorization.

224891997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23629 (or 23612 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 224891997 is about 14996.3994678723. The cubic root of 224891997 is about 608.1228660468.

The spelling of 224891997 in words is "two hundred twenty-four million, eight hundred ninety-one thousand, nine hundred ninety-seven".