1601101515 has 16 divisors (see below), whose sum is σ = 2758821408. Its totient is φ = 788234496.

The previous prime is 1601101499. The next prime is 1601101529. The reversal of 1601101515 is 5151011061.

It is a happy number.

It is not a de Polignac number, because 1601101515 - 2⁴ = 1601101499 is a prime.

It is a super-2 number, since 2×1601101515² = 5127052122670590450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1601101491 and 1601101500.

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, 4105194 + ... + 4105583.

It is an arithmetic number, because the mean of its divisors is an integer number (172426338).

Almost surely, 2^1601101515 is an apocalyptic number.

1601101515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1601101515 is a deficient number, since it is larger than the sum of its proper divisors (1157719893).

1601101515 is a wasteful number, since it uses less digits than its factorization.

1601101515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8210798.

The product of its (nonzero) digits is 150, while the sum is 21.

The square root of 1601101515 is about 40013.7665685199. The cubic root of 1601101515 is about 1169.8754378313.

Adding to 1601101515 its reverse (5151011061), we get a palindrome (6752112576).

The spelling of 1601101515 in words is "one billion, six hundred one million, one hundred one thousand, five hundred fifteen".