1656223413 has 32 divisors (see below), whose sum is σ = 2441413632. Its totient is φ = 992217600.

The previous prime is 1656223409. The next prime is 1656223421. The reversal of 1656223413 is 3143226561.

It is not a de Polignac number, because 1656223413 - 2² = 1656223409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656223463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1056156 + ... + 1057722.

It is an arithmetic number, because the mean of its divisors is an integer number (76294176).

Almost surely, 2^1656223413 is an apocalyptic number.

1656223413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1656223413 is a deficient number, since it is larger than the sum of its proper divisors (785190219).

1656223413 is a wasteful number, since it uses less digits than its factorization.

1656223413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285.

The product of its digits is 25920, while the sum is 33.

The square root of 1656223413 is about 40696.7248436530. The cubic root of 1656223413 is about 1183.1495418759.

Adding to 1656223413 its reverse (3143226561), we get a palindrome (4799449974).

The spelling of 1656223413 in words is "one billion, six hundred fifty-six million, two hundred twenty-three thousand, four hundred thirteen".