102421631 has 8 divisors (see below), whose sum is σ = 110433120. Its totient is φ = 94429152.

The previous prime is 102421607. The next prime is 102421637. The reversal of 102421631 is 136124201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102421631 is a prime.

It is a super-2 number, since 2×102421631² = 20980380993400322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102421637) 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, 7661 + ... + 16233.

It is an arithmetic number, because the mean of its divisors is an integer number (13804140).

Almost surely, 2^102421631 is an apocalyptic number.

102421631 is a deficient number, since it is larger than the sum of its proper divisors (8011489).

102421631 is an equidigital number, since it uses as much as digits as its factorization.

102421631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9505.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 102421631 is about 10120.3572565399. The cubic root of 102421631 is about 467.8757782050.

Adding to 102421631 its reverse (136124201), we get a palindrome (238545832).

The spelling of 102421631 in words is "one hundred two million, four hundred twenty-one thousand, six hundred thirty-one".