102047431 has 2 divisors, whose sum is σ = 102047432. Its totient is φ = 102047430.

The previous prime is 102047417. The next prime is 102047459. The reversal of 102047431 is 134740201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102047431 - 2⁷ = 102047303 is a prime.

It is a super-2 number, since 2×102047431² = 20827356347399522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102047531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51023715 + 51023716.

It is an arithmetic number, because the mean of its divisors is an integer number (51023716).

Almost surely, 2^102047431 is an apocalyptic number.

102047431 is a deficient number, since it is larger than the sum of its proper divisors (1).

102047431 is an equidigital number, since it uses as much as digits as its factorization.

102047431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 102047431 is about 10101.8528498489. The cubic root of 102047431 is about 467.3052842349.

Adding to 102047431 its reverse (134740201), we get a palindrome (236787632).

The spelling of 102047431 in words is "one hundred two million, forty-seven thousand, four hundred thirty-one".