531203399961 has 32 divisors (see below), whose sum is σ = 768480690432. Its totient is φ = 324443750400.

The previous prime is 531203399959. The next prime is 531203400017. The reversal of 531203399961 is 169993302135.

It is not a de Polignac number, because 531203399961 - 2¹ = 531203399959 is a prime.

It is a super-2 number, since 2×531203399961² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (531203399911) 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 31 ways as a sum of consecutive naturals, for example, 6750901 + ... + 6829133.

It is an arithmetic number, because the mean of its divisors is an integer number (24015021576).

Almost surely, 2^531203399961 is an apocalyptic number.

It is an amenable number.

531203399961 is a deficient number, since it is larger than the sum of its proper divisors (237277290471).

531203399961 is a wasteful number, since it uses less digits than its factorization.

531203399961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79553.

The product of its (nonzero) digits is 1180980, while the sum is 51.

The spelling of 531203399961 in words is "five hundred thirty-one billion, two hundred three million, three hundred ninety-nine thousand, nine hundred sixty-one".