2531399377 has 4 divisors (see below), whose sum is σ = 2726122420. Its totient is φ = 2336676336.

The previous prime is 2531399287. The next prime is 2531399383. The reversal of 2531399377 is 7739931352.

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 212110096 + 2319289281 = 14564^2 + 48159^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531399377 - 2⁷ = 2531399249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2531399377.

It is not an unprimeable number, because it can be changed into a prime (2531393377) 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, 97361502 + ... + 97361527.

It is an arithmetic number, because the mean of its divisors is an integer number (681530605).

Almost surely, 2^2531399377 is an apocalyptic number.

It is an amenable number.

2531399377 is a deficient number, since it is larger than the sum of its proper divisors (194723043).

2531399377 is a wasteful number, since it uses less digits than its factorization.

2531399377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194723042.

The product of its digits is 1071630, while the sum is 49.

The square root of 2531399377 is about 50313.0139924056. The cubic root of 2531399377 is about 1362.8672525928.

The spelling of 2531399377 in words is "two billion, five hundred thirty-one million, three hundred ninety-nine thousand, three hundred seventy-seven".