5251547561 has 8 divisors (see below), whose sum is σ = 5682319104. Its totient is φ = 4824605520.

The previous prime is 5251547551. The next prime is 5251547573. The reversal of 5251547561 is 1657451525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5251547561 - 2²² = 5247353257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5251547551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954521 + ... + 960006.

It is an arithmetic number, because the mean of its divisors is an integer number (710289888).

Almost surely, 2^5251547561 is an apocalyptic number.

It is an amenable number.

5251547561 is a deficient number, since it is larger than the sum of its proper divisors (430771543).

5251547561 is a wasteful number, since it uses less digits than its factorization.

5251547561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914751.

The product of its digits is 210000, while the sum is 41.

The square root of 5251547561 is about 72467.5621295487. The cubic root of 5251547561 is about 1738.1840791033.

The spelling of 5251547561 in words is "five billion, two hundred fifty-one million, five hundred forty-seven thousand, five hundred sixty-one".