2151240431 has 16 divisors (see below), whose sum is σ = 2258731008. Its totient is φ = 2047147200.

The previous prime is 2151240419. The next prime is 2151240433. The reversal of 2151240431 is 1340421512.

It is a cyclic number.

It is not a de Polignac number, because 2151240431 - 2¹⁰ = 2151239407 is a prime.

It is a super-2 number, since 2×2151240431² = 9255670783938131522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151240397 and 2151240406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151240433) 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, 239186 + ... + 248016.

It is an arithmetic number, because the mean of its divisors is an integer number (141170688).

Almost surely, 2^2151240431 is an apocalyptic number.

2151240431 is a deficient number, since it is larger than the sum of its proper divisors (107490577).

2151240431 is an equidigital number, since it uses as much as digits as its factorization.

2151240431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9022.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2151240431 is about 46381.4664602145. The cubic root of 2151240431 is about 1290.9110466360.

Adding to 2151240431 its reverse (1340421512), we get a palindrome (3491661943).

The spelling of 2151240431 in words is "two billion, one hundred fifty-one million, two hundred forty thousand, four hundred thirty-one".