102145631 has 8 divisors (see below), whose sum is σ = 116941440. Its totient is φ = 87400728.

The previous prime is 102145583. The next prime is 102145633. The reversal of 102145631 is 136541201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102145631 - 2¹⁰ = 102144607 is a prime.

It is a super-2 number, since 2×102145631² = 20867459864776322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102145597 and 102145606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102145633) 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, 8321 + ... + 16538.

It is an arithmetic number, because the mean of its divisors is an integer number (14617680).

Almost surely, 2^102145631 is an apocalyptic number.

102145631 is a deficient number, since it is larger than the sum of its proper divisors (14795809).

102145631 is an equidigital number, since it uses as much as digits as its factorization.

102145631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25453.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 102145631 is about 10106.7121755792. The cubic root of 102145631 is about 467.4551317668.

Adding to 102145631 its reverse (136541201), we get a palindrome (238686832).

The spelling of 102145631 in words is "one hundred two million, one hundred forty-five thousand, six hundred thirty-one".