102400240087 has 4 divisors (see below), whose sum is σ = 102402768096. Its totient is φ = 102397712080.

The previous prime is 102400240049. The next prime is 102400240147. The reversal of 102400240087 is 780042004201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780042004201 = 16573 ⋅47067037.

It is a cyclic number.

It is not a de Polignac number, because 102400240087 - 2³⁵ = 68040501719 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 (102400240037) 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, 1202239 + ... + 1284592.

It is an arithmetic number, because the mean of its divisors is an integer number (25600692024).

Almost surely, 2^102400240087 is an apocalyptic number.

102400240087 is a deficient number, since it is larger than the sum of its proper divisors (2528009).

102400240087 is an equidigital number, since it uses as much as digits as its factorization.

102400240087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528008.

The product of its (nonzero) digits is 3584, while the sum is 28.

Adding to 102400240087 its reverse (780042004201), we get a palindrome (882442244288).

The spelling of 102400240087 in words is "one hundred two billion, four hundred million, two hundred forty thousand, eighty-seven".