103215431 has 16 divisors (see below), whose sum is σ = 115734528. Its totient is φ = 91245600.

The previous prime is 103215419. The next prime is 103215457. The reversal of 103215431 is 134512301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103215431 is a prime.

It is a super-2 number, since 2×103215431² = 21306850393031522, 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 (103215631) 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, 93026 + ... + 94128.

It is an arithmetic number, because the mean of its divisors is an integer number (7233408).

Almost surely, 2^103215431 is an apocalyptic number.

103215431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

103215431 is a deficient number, since it is larger than the sum of its proper divisors (12519097).

103215431 is a wasteful number, since it uses less digits than its factorization.

103215431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 103215431 is about 10159.4995447611. The cubic root of 103215431 is about 469.0813972740.

Adding to 103215431 its reverse (134512301), we get a palindrome (237727732).

The spelling of 103215431 in words is "one hundred three million, two hundred fifteen thousand, four hundred thirty-one".