2517254821 has 4 divisors (see below), whose sum is σ = 2665328652. Its totient is φ = 2369180992.

The previous prime is 2517254807. The next prime is 2517254867. The reversal of 2517254821 is 1284527152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2187432900 + 329821921 = 46770^2 + 18161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2517254821 - 2⁹ = 2517254309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2517254891) 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, 74036890 + ... + 74036923.

It is an arithmetic number, because the mean of its divisors is an integer number (666332163).

Almost surely, 2^2517254821 is an apocalyptic number.

It is an amenable number.

2517254821 is a deficient number, since it is larger than the sum of its proper divisors (148073831).

2517254821 is a wasteful number, since it uses less digits than its factorization.

2517254821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148073830.

The product of its digits is 44800, while the sum is 37.

The square root of 2517254821 is about 50172.2515041930. The cubic root of 2517254821 is about 1360.3241047410.

The spelling of 2517254821 in words is "two billion, five hundred seventeen million, two hundred fifty-four thousand, eight hundred twenty-one".