2141561531 has 8 divisors (see below), whose sum is σ = 2147005440. Its totient is φ = 2136125992.

The previous prime is 2141561501. The next prime is 2141561537. The reversal of 2141561531 is 1351651412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2141561531 is a prime.

It is a super-2 number, since 2×2141561531² = 9172571582118127922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2141561494 and 2141561503.

It is not an unprimeable number, because it can be changed into a prime (2141561537) 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, 1068176 + ... + 1070178.

It is an arithmetic number, because the mean of its divisors is an integer number (268375680).

Almost surely, 2^2141561531 is an apocalyptic number.

2141561531 is a deficient number, since it is larger than the sum of its proper divisors (5443909).

2141561531 is a wasteful number, since it uses less digits than its factorization.

2141561531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185.

The product of its digits is 3600, while the sum is 29.

The square root of 2141561531 is about 46277.0086652108. The cubic root of 2141561531 is about 1288.9721056773.

The spelling of 2141561531 in words is "two billion, one hundred forty-one million, five hundred sixty-one thousand, five hundred thirty-one".