2051654427531 has 48 divisors (see below), whose sum is σ = 3140590235328. Its totient is φ = 1288866124800.

The previous prime is 2051654427481. The next prime is 2051654427547. The reversal of 2051654427531 is 1357244561502.

2051654427531 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 6 + 544 + 2 + 75 + 31 = 666.

It is not a de Polignac number, because 2051654427531 - 2³³ = 2043064492939 is a prime.

It is a super-3 number, since 3×2051654427531³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2051654427731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1322026 + ... + 2418896.

It is an arithmetic number, because the mean of its divisors is an integer number (65428963236).

Almost surely, 2^{2051654427531} is an apocalyptic number.

2051654427531 is a deficient number, since it is larger than the sum of its proper divisors (1088935807797).

2051654427531 is a wasteful number, since it uses less digits than its factorization.

2051654427531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097092 (or 1097089 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 45.

The spelling of 2051654427531 in words is "two trillion, fifty-one billion, six hundred fifty-four million, four hundred twenty-seven thousand, five hundred thirty-one".