23015961 has 16 divisors (see below), whose sum is σ = 35020800. Its totient is φ = 14928624.

The previous prime is 23015957. The next prime is 23015989. The reversal of 23015961 is 16951032.

23015961 = T₄₅₀ + T₄₅₁ + ... + T₆₁₁.

It is not a de Polignac number, because 23015961 - 2² = 23015957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23015921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10521 + ... + 12518.

It is an arithmetic number, because the mean of its divisors is an integer number (2188800).

Almost surely, 2^23015961 is an apocalyptic number.

It is an amenable number.

23015961 is a deficient number, since it is larger than the sum of its proper divisors (12004839).

23015961 is a wasteful number, since it uses less digits than its factorization.

23015961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23085 (or 23079 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 23015961 is about 4797.4952839998. The cubic root of 23015961 is about 284.4524667752.

Adding to 23015961 its reverse (16951032), we get a palindrome (39966993).

The spelling of 23015961 in words is "twenty-three million, fifteen thousand, nine hundred sixty-one".