54661531 has 2 divisors, whose sum is σ = 54661532. Its totient is φ = 54661530.

The previous prime is 54661507. The next prime is 54661571. The reversal of 54661531 is 13516645.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54661531 - 2¹⁹ = 54137243 is a prime.

It is a super-2 number, since 2×54661531² = 5975765942527922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 54661493 and 54661502.

It is not a weakly prime, because it can be changed into another prime (54661571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27330765 + 27330766.

It is an arithmetic number, because the mean of its divisors is an integer number (27330766).

Almost surely, 2^54661531 is an apocalyptic number.

54661531 is a deficient number, since it is larger than the sum of its proper divisors (1).

54661531 is an equidigital number, since it uses as much as digits as its factorization.

54661531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 54661531 is about 7393.3436955142. The cubic root of 54661531 is about 379.5135303116.

The spelling of 54661531 in words is "fifty-four million, six hundred sixty-one thousand, five hundred thirty-one".