1621463312031 has 32 divisors (see below), whose sum is σ = 2255291723520. Its totient is φ = 1035388569600.

The previous prime is 1621463312017. The next prime is 1621463312081. The reversal of 1621463312031 is 1302133641261.

It is not a de Polignac number, because 1621463312031 - 2⁹ = 1621463311519 is a prime.

It is a super-2 number, since 2×1621463312031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1621463311983 and 1621463312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621463312081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2293375 + ... + 2915903.

It is an arithmetic number, because the mean of its divisors is an integer number (70477866360).

Almost surely, 2^{1621463312031} is an apocalyptic number.

1621463312031 is a deficient number, since it is larger than the sum of its proper divisors (633828411489).

1621463312031 is a wasteful number, since it uses less digits than its factorization.

1621463312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622967.

The product of its (nonzero) digits is 15552, while the sum is 33.

Adding to 1621463312031 its reverse (1302133641261), we get a palindrome (2923596953292).

The spelling of 1621463312031 in words is "one trillion, six hundred twenty-one billion, four hundred sixty-three million, three hundred twelve thousand, thirty-one".