1497193221 has 16 divisors (see below), whose sum is σ = 2058788864. Its totient is φ = 967229424.

The previous prime is 1497193207. The next prime is 1497193223. The reversal of 1497193221 is 1223917941.

It is not a de Polignac number, because 1497193221 - 2¹⁰ = 1497192197 is a prime.

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 1497193221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497193223) 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, 29311 + ... + 62076.

It is an arithmetic number, because the mean of its divisors is an integer number (128674304).

Almost surely, 2^1497193221 is an apocalyptic number.

It is an amenable number.

1497193221 is a deficient number, since it is larger than the sum of its proper divisors (561595643).

1497193221 is a wasteful number, since it uses less digits than its factorization.

1497193221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91560.

The product of its digits is 27216, while the sum is 39.

The square root of 1497193221 is about 38693.5811343432. The cubic root of 1497193221 is about 1143.9998056649. Note that the first 3 decimals are identical.

The spelling of 1497193221 in words is "one billion, four hundred ninety-seven million, one hundred ninety-three thousand, two hundred twenty-one".