2051431 has 8 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 1961568.

The previous prime is 2051429. The next prime is 2051437. The reversal of 2051431 is 1341502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2051431 - 2¹ = 2051429 is a prime.

It is a super-2 number, since 2×2051431² = 8416738295522, which contains 22 as substring.

It is a Duffinian number.

2051431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3405 + ... + 3961.

It is an arithmetic number, because the mean of its divisors is an integer number (267840).

2^2051431 is an apocalyptic number.

2051431 is a deficient number, since it is larger than the sum of its proper divisors (91289).

2051431 is a wasteful number, since it uses less digits than its factorization.

2051431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2051431 is about 1432.2817460262. The cubic root of 2051431 is about 127.0629609076.

Adding to 2051431 its reverse (1341502), we get a palindrome (3392933).

The spelling of 2051431 in words is "two million, fifty-one thousand, four hundred thirty-one".