621342252531 has 192 divisors, whose sum is σ = 1230459310080. Its totient is φ = 291683358720.

The previous prime is 621342252493. The next prime is 621342252563. The reversal of 621342252531 is 135252243126.

621342252531 is a `hidden beast` number, since 6 + 21 + 34 + 22 + 52 + 531 = 666.

It is not a de Polignac number, because 621342252531 - 2¹³ = 621342244339 is a prime.

It is a super-2 number, since 2×621342252531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621342252571) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 271683270 + ... + 271685556.

It is an arithmetic number, because the mean of its divisors is an integer number (6408642240).

Almost surely, 2^621342252531 is an apocalyptic number.

621342252531 is a deficient number, since it is larger than the sum of its proper divisors (609117057549).

621342252531 is a wasteful number, since it uses less digits than its factorization.

621342252531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946 (or 2943 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

Adding to 621342252531 its reverse (135252243126), we get a palindrome (756594495657).

The spelling of 621342252531 in words is "six hundred twenty-one billion, three hundred forty-two million, two hundred fifty-two thousand, five hundred thirty-one".