102620340531 has 8 divisors (see below), whose sum is σ = 152030134160. Its totient is φ = 68413560336.

The previous prime is 102620340527. The next prime is 102620340619. The reversal of 102620340531 is 135043026201.

102620340531 is a `hidden beast` number, since 1 + 0 + 2 + 620 + 3 + 4 + 0 + 5 + 31 = 666.

It is not a de Polignac number, because 102620340531 - 2² = 102620340527 is a prime.

It is a super-2 number, since 2×102620340531² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3800753353 = 102620340531 / (1 + 0 + 2 + 6 + 2 + 0 + 3 + 4 + 0 + 5 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102620340495 and 102620340504.

It is not an unprimeable number, because it can be changed into a prime (102620340131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900376650 + ... + 1900376703.

It is an arithmetic number, because the mean of its divisors is an integer number (19003766770).

Almost surely, 2^102620340531 is an apocalyptic number.

102620340531 is a deficient number, since it is larger than the sum of its proper divisors (49409793629).

102620340531 is an equidigital number, since it uses as much as digits as its factorization.

102620340531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800753362 (or 3800753356 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 102620340531 its reverse (135043026201), we get a palindrome (237663366732).

The spelling of 102620340531 in words is "one hundred two billion, six hundred twenty million, three hundred forty thousand, five hundred thirty-one".