2135431 has 4 divisors (see below), whose sum is σ = 2151864.
Its totient is φ = 2119000.
The previous prime is 2135417. The next prime is 2135447. The reversal of 2135431 is 1345312.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 2135431 - 27 = 2135303 is a prime.
It is a super-2 number, since 2×21354312 = 9120131111522, which contains 22 as substring.
It is an Ulam number.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 2135399 and 2135408.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2135401) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8020 + ... + 8281.
It is an arithmetic number, because the mean of its divisors is an integer number (537966).
22135431 is an apocalyptic number.
2135431 is a deficient number, since it is larger than the sum of its proper divisors (16433).
2135431 is a wasteful number, since it uses less digits than its factorization.
2135431 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 16432.
The product of its digits is 360, while the sum is 19.
The square root of 2135431 is about 1461.3113973414.
The cubic root of 2135431 is about 128.7740973528.
The spelling of 2135431 in words is "two million, one hundred thirty-five thousand, four hundred thirty-one".