3151340421 has 4 divisors (see below), whose sum is σ = 4201787232. Its totient is φ = 2100893612.

The previous prime is 3151340417. The next prime is 3151340453. The reversal of 3151340421 is 1240431513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1240431513 = 3 ⋅413477171.

It is a cyclic number.

It is not a de Polignac number, because 3151340421 - 2² = 3151340417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3151340391 and 3151340400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3151340411) 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, 525223401 + ... + 525223406.

It is an arithmetic number, because the mean of its divisors is an integer number (1050446808).

Almost surely, 2^3151340421 is an apocalyptic number.

It is an amenable number.

3151340421 is a deficient number, since it is larger than the sum of its proper divisors (1050446811).

3151340421 is a wasteful number, since it uses less digits than its factorization.

3151340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050446810.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 3151340421 is about 56136.8009508914. The cubic root of 3151340421 is about 1466.1051073711.

Adding to 3151340421 its reverse (1240431513), we get a palindrome (4391771934).

The spelling of 3151340421 in words is "three billion, one hundred fifty-one million, three hundred forty thousand, four hundred twenty-one".