1206020551531 has 2 divisors, whose sum is σ = 1206020551532. Its totient is φ = 1206020551530.

The previous prime is 1206020551481. The next prime is 1206020551543. The reversal of 1206020551531 is 1351550206021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1206020551531 - 2⁷ = 1206020551403 is a prime.

It is a super-2 number, since 2×1206020551531² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1206020551493 and 1206020551502.

It is not a weakly prime, because it can be changed into another prime (1206020551331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603010275765 + 603010275766.

It is an arithmetic number, because the mean of its divisors is an integer number (603010275766).

Almost surely, 2^{1206020551531} is an apocalyptic number.

1206020551531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206020551531 is an equidigital number, since it uses as much as digits as its factorization.

1206020551531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 1206020551531 its reverse (1351550206021), we get a palindrome (2557570757552).

The spelling of 1206020551531 in words is "one trillion, two hundred six billion, twenty million, five hundred fifty-one thousand, five hundred thirty-one".