1613625321 has 32 divisors (see below), whose sum is σ = 2737152000. Its totient is φ = 838241040.

The previous prime is 1613625311. The next prime is 1613625341. The reversal of 1613625321 is 1235263161.

It is not a de Polignac number, because 1613625321 - 2⁶ = 1613625257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1613625301) 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, 59961 + ... + 82598.

It is an arithmetic number, because the mean of its divisors is an integer number (85536000).

Almost surely, 2^1613625321 is an apocalyptic number.

1613625321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1613625321 is a deficient number, since it is larger than the sum of its proper divisors (1123526679).

1613625321 is a wasteful number, since it uses less digits than its factorization.

1613625321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142594 (or 142580 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 1613625321 is about 40169.9554518050. The cubic root of 1613625321 is about 1172.9177719701.

Adding to 1613625321 its reverse (1235263161), we get a palindrome (2848888482).

The spelling of 1613625321 in words is "one billion, six hundred thirteen million, six hundred twenty-five thousand, three hundred twenty-one".