5151561 has 16 divisors (see below), whose sum is σ = 7366464. Its totient is φ = 3190784.

The previous prime is 5151551. The next prime is 5151577. The reversal of 5151561 is 1651515.

It is a cyclic number.

It is not a de Polignac number, because 5151561 - 2⁹ = 5151049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5151521) 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, 3625 + ... + 4841.

It is an arithmetic number, because the mean of its divisors is an integer number (460404).

Almost surely, 2^5151561 is an apocalyptic number.

5151561 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5151561 is a deficient number, since it is larger than the sum of its proper divisors (2214903).

5151561 is a wasteful number, since it uses less digits than its factorization.

5151561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

The product of its digits is 750, while the sum is 24.

The square root of 5151561 is about 2269.7050469169. The cubic root of 5151561 is about 172.7081964243.

The spelling of 5151561 in words is "five million, one hundred fifty-one thousand, five hundred sixty-one".