2506623731 has 4 divisors (see below), whose sum is σ = 2507940072. Its totient is φ = 2505307392.

The previous prime is 2506623661. The next prime is 2506623733. The reversal of 2506623731 is 1373266052.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2506623731 is a prime.

It is a super-2 number, since 2×2506623731² = 12566325057624720722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2506623691 and 2506623700.

It is not an unprimeable number, because it can be changed into a prime (2506623733) 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, 655310 + ... + 659123.

It is an arithmetic number, because the mean of its divisors is an integer number (626985018).

Almost surely, 2^2506623731 is an apocalyptic number.

2506623731 is a deficient number, since it is larger than the sum of its proper divisors (1316341).

2506623731 is a wasteful number, since it uses less digits than its factorization.

2506623731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316340.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 2506623731 is about 50066.1934942132. The cubic root of 2506623731 is about 1358.4063893996.

Adding to 2506623731 its reverse (1373266052), we get a palindrome (3879889783).

The spelling of 2506623731 in words is "two billion, five hundred six million, six hundred twenty-three thousand, seven hundred thirty-one".