3151556461 has 4 divisors (see below), whose sum is σ = 3152508192. Its totient is φ = 3150604732.

The previous prime is 3151556423. The next prime is 3151556479. The reversal of 3151556461 is 1646551513.

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: 1646551513 = 41 ⋅40159793.

It is a cyclic number.

It is not a de Polignac number, because 3151556461 - 2¹⁵ = 3151523693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3151556461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3151556561) 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, 470881 + ... + 477526.

It is an arithmetic number, because the mean of its divisors is an integer number (788127048).

Almost surely, 2^3151556461 is an apocalyptic number.

It is an amenable number.

3151556461 is a deficient number, since it is larger than the sum of its proper divisors (951731).

3151556461 is an equidigital number, since it uses as much as digits as its factorization.

3151556461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951730.

The product of its digits is 54000, while the sum is 37.

The square root of 3151556461 is about 56138.7251458385. The cubic root of 3151556461 is about 1466.1386095286.

The spelling of 3151556461 in words is "three billion, one hundred fifty-one million, five hundred fifty-six thousand, four hundred sixty-one".