1662513225 has 12 divisors (see below), whose sum is σ = 2748688656. Its totient is φ = 886673680.

The previous prime is 1662513217. The next prime is 1662513233. The reversal of 1662513225 is 5223152661.

It is an interprime number because it is at equal distance from previous prime (1662513217) and next prime (1662513233).

It is not a de Polignac number, because 1662513225 - 2³ = 1662513217 is a prime.

It is a super-3 number, since 3×1662513225³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11083347 + ... + 11083496.

It is an arithmetic number, because the mean of its divisors is an integer number (229057388).

Almost surely, 2^1662513225 is an apocalyptic number.

1662513225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1662513225 is a deficient number, since it is larger than the sum of its proper divisors (1086175431).

1662513225 is a wasteful number, since it uses less digits than its factorization.

1662513225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22166856 (or 22166851 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 1662513225 is about 40773.9282507830. The cubic root of 1662513225 is about 1184.6453923019.

Adding to 1662513225 its reverse (5223152661), we get a palindrome (6885665886).

The spelling of 1662513225 in words is "one billion, six hundred sixty-two million, five hundred thirteen thousand, two hundred twenty-five".