2517900381 has 12 divisors (see below), whose sum is σ = 3645611580. Its totient is φ = 1674610560.

The previous prime is 2517900377. The next prime is 2517900391. The reversal of 2517900381 is 1830097152.

It can be written as a sum of positive squares in 2 ways, for example, as 120231225 + 2397669156 = 10965^2 + 48966^2 .

It is not a de Polignac number, because 2517900381 - 2² = 2517900377 is a prime.

It is a super-2 number, since 2×2517900381² = 12679644657279890322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2517900391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328476 + ... + 336053.

It is an arithmetic number, because the mean of its divisors is an integer number (303800965).

Almost surely, 2^2517900381 is an apocalyptic number.

It is an amenable number.

2517900381 is a deficient number, since it is larger than the sum of its proper divisors (1127711199).

2517900381 is a wasteful number, since it uses less digits than its factorization.

2517900381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664956 (or 664953 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 2517900381 is about 50178.6845283931. The cubic root of 2517900381 is about 1360.4403816421.

The spelling of 2517900381 in words is "two billion, five hundred seventeen million, nine hundred thousand, three hundred eighty-one".