1630121115 has 16 divisors (see below), whose sum is σ = 2980793088. Its totient is φ = 745198176.

The previous prime is 1630121107. The next prime is 1630121137. The reversal of 1630121115 is 5111210361.

It is a happy number.

It is not a de Polignac number, because 1630121115 - 2³ = 1630121107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1630121091 and 1630121100.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7762377 + ... + 7762586.

It is an arithmetic number, because the mean of its divisors is an integer number (186299568).

Almost surely, 2^1630121115 is an apocalyptic number.

1630121115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1630121115 is a deficient number, since it is larger than the sum of its proper divisors (1350671973).

1630121115 is a wasteful number, since it uses less digits than its factorization.

1630121115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15524978.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1630121115 is about 40374.7583893700. The cubic root of 1630121115 is about 1176.9010698163.

Adding to 1630121115 its reverse (5111210361), we get a palindrome (6741331476).

The spelling of 1630121115 in words is "one billion, six hundred thirty million, one hundred twenty-one thousand, one hundred fifteen".