2451391361 has 12 divisors (see below), whose sum is σ = 2527885140. Its totient is φ = 2376989280.

The previous prime is 2451391357. The next prime is 2451391399. The reversal of 2451391361 is 1631931542.

It can be written as a sum of positive squares in 2 ways, for example, as 1588500736 + 862890625 = 39856^2 + 29375^2 .

It is not a de Polignac number, because 2451391361 - 2² = 2451391357 is a prime.

It is a super-4 number, since 4×2451391361⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2451391321) 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, 235691 + ... + 245871.

It is an arithmetic number, because the mean of its divisors is an integer number (210657095).

Almost surely, 2^2451391361 is an apocalyptic number.

It is an amenable number.

2451391361 is a deficient number, since it is larger than the sum of its proper divisors (76493779).

2451391361 is a wasteful number, since it uses less digits than its factorization.

2451391361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10384 (or 10337 counting only the distinct ones).

The product of its digits is 19440, while the sum is 35.

The square root of 2451391361 is about 49511.5275567216. The cubic root of 2451391361 is about 1348.3548979774.

The spelling of 2451391361 in words is "two billion, four hundred fifty-one million, three hundred ninety-one thousand, three hundred sixty-one".