5145121057 has 4 divisors (see below), whose sum is σ = 5311092736. Its totient is φ = 4979149380.

The previous prime is 5145121049. The next prime is 5145121081. The reversal of 5145121057 is 7501215415.

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: 7501215415 = 5 ⋅1500243083.

It is a cyclic number.

It is not a de Polignac number, because 5145121057 - 2³ = 5145121049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 165971647 = 5145121057 / (5 + 1 + 4 + 5 + 1 + 2 + 1 + 0 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5145121027) 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 3 ways as a sum of consecutive naturals, for example, 82985793 + ... + 82985854.

It is an arithmetic number, because the mean of its divisors is an integer number (1327773184).

Almost surely, 2^5145121057 is an apocalyptic number.

It is an amenable number.

5145121057 is a deficient number, since it is larger than the sum of its proper divisors (165971679).

5145121057 is a wasteful number, since it uses less digits than its factorization.

5145121057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165971678.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 5145121057 is about 71729.4992105758. The cubic root of 5145121057 is about 1726.3619917090.

The spelling of 5145121057 in words is "five billion, one hundred forty-five million, one hundred twenty-one thousand, fifty-seven".