2651201561531 has 4 divisors (see below), whose sum is σ = 2670274954200. Its totient is φ = 2632128168864.

The previous prime is 2651201561497. The next prime is 2651201561539. The reversal of 2651201561531 is 1351651021562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2651201561531 - 2³⁸ = 2376323654587 is a prime.

It is a super-2 number, since 2×2651201561531² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2651201561539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9536696126 + ... + 9536696403.

It is an arithmetic number, because the mean of its divisors is an integer number (667568738550).

Almost surely, 2^{2651201561531} is an apocalyptic number.

2651201561531 is a deficient number, since it is larger than the sum of its proper divisors (19073392669).

2651201561531 is a wasteful number, since it uses less digits than its factorization.

2651201561531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19073392668.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 2651201561531 in words is "two trillion, six hundred fifty-one billion, two hundred one million, five hundred sixty-one thousand, five hundred thirty-one".