102340615261 has 4 divisors (see below), whose sum is σ = 102362297724. Its totient is φ = 102318932800.

The previous prime is 102340615151. The next prime is 102340615309. The reversal of 102340615261 is 162516043201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162516043201 = 3307 ⋅49143043.

It can be written as a sum of positive squares in 2 ways, for example, as 29110843161 + 73229772100 = 170619^2 + 270610^2 .

It is a cyclic number.

It is not a de Polignac number, because 102340615261 - 2⁷ = 102340615133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102340615661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10834150 + ... + 10843591.

It is an arithmetic number, because the mean of its divisors is an integer number (25590574431).

Almost surely, 2^102340615261 is an apocalyptic number.

It is an amenable number.

102340615261 is a deficient number, since it is larger than the sum of its proper divisors (21682463).

102340615261 is an equidigital number, since it uses as much as digits as its factorization.

102340615261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21682462.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 102340615261 its reverse (162516043201), we get a palindrome (264856658462).

The spelling of 102340615261 in words is "one hundred two billion, three hundred forty million, six hundred fifteen thousand, two hundred sixty-one".