1613245521 has 8 divisors (see below), whose sum is σ = 2264204320. Its totient is φ = 1018891872.

The previous prime is 1613245511. The next prime is 1613245609. The reversal of 1613245521 is 1255423161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1613245521 - 2¹¹ = 1613243473 is a prime.

It is a super-2 number, since 2×1613245521² = 5205122222053122882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1613245511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14151220 + ... + 14151333.

It is an arithmetic number, because the mean of its divisors is an integer number (283025540).

Almost surely, 2^1613245521 is an apocalyptic number.

It is an amenable number.

1613245521 is a deficient number, since it is larger than the sum of its proper divisors (650958799).

1613245521 is a wasteful number, since it uses less digits than its factorization.

1613245521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28302575.

The product of its digits is 7200, while the sum is 30.

The square root of 1613245521 is about 40165.2277598422. The cubic root of 1613245521 is about 1172.8257412863.

Adding to 1613245521 its reverse (1255423161), we get a palindrome (2868668682).

The spelling of 1613245521 in words is "one billion, six hundred thirteen million, two hundred forty-five thousand, five hundred twenty-one".