103815431 has 2 divisors, whose sum is σ = 103815432. Its totient is φ = 103815430.

The previous prime is 103815409. The next prime is 103815443. The reversal of 103815431 is 134518301.

It is a strong prime.

It is an emirp because it is prime and its reverse (134518301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103815431 - 2¹⁰ = 103814407 is a prime.

It is a super-2 number, since 2×103815431² = 21555287427431522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 103815431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103815461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51907715 + 51907716.

It is an arithmetic number, because the mean of its divisors is an integer number (51907716).

Almost surely, 2^103815431 is an apocalyptic number.

103815431 is a deficient number, since it is larger than the sum of its proper divisors (1).

103815431 is an equidigital number, since it uses as much as digits as its factorization.

103815431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 103815431 is about 10188.9857689566. The cubic root of 103815431 is about 469.9885782648.

The spelling of 103815431 in words is "one hundred three million, eight hundred fifteen thousand, four hundred thirty-one".