103135431 has 16 divisors (see below), whose sum is σ = 157824000. Its totient is φ = 58685088.

The previous prime is 103135423. The next prime is 103135451. The reversal of 103135431 is 134531301.

It is not a de Polignac number, because 103135431 - 2³ = 103135423 is a prime.

It is a super-2 number, since 2×103135431² = 21273834255111522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 103135398 and 103135407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103135421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5256 + ... + 15293.

It is an arithmetic number, because the mean of its divisors is an integer number (9864000).

Almost surely, 2^103135431 is an apocalyptic number.

103135431 is a deficient number, since it is larger than the sum of its proper divisors (54688569).

103135431 is a wasteful number, since it uses less digits than its factorization.

103135431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20798.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 103135431 is about 10155.5615797454. The cubic root of 103135431 is about 468.9601744074.

Adding to 103135431 its reverse (134531301), we get a palindrome (237666732).

The spelling of 103135431 in words is "one hundred three million, one hundred thirty-five thousand, four hundred thirty-one".