3121154451 has 28 divisors (see below), whose sum is σ = 4684117080. Its totient is φ = 2078758080.

The previous prime is 3121154429. The next prime is 3121154459. The reversal of 3121154451 is 1544511213.

3121154451 is a `hidden beast` number, since 3 + 1 + 211 + 5 + 445 + 1 = 666.

It is not a de Polignac number, because 3121154451 - 2²⁶ = 3054045587 is a prime.

It is a super-2 number, since 2×3121154451² = 19483210213994222802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3121154459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1464955 + ... + 1467083.

Almost surely, 2^3121154451 is an apocalyptic number.

3121154451 is a deficient number, since it is larger than the sum of its proper divisors (1562962629).

3121154451 is an equidigital number, since it uses as much as digits as its factorization.

3121154451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158 (or 4143 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 3121154451 is about 55867.2932134715. The cubic root of 3121154451 is about 1461.4089187582.

Adding to 3121154451 its reverse (1544511213), we get a palindrome (4665665664).

The spelling of 3121154451 in words is "three billion, one hundred twenty-one million, one hundred fifty-four thousand, four hundred fifty-one".