5212631781 has 12 divisors (see below), whose sum is σ = 8604979552. Its totient is φ = 2978646696.

The previous prime is 5212631747. The next prime is 5212631791. The reversal of 5212631781 is 1871362125.

5212631781 is a `hidden beast` number, since 5 + 2 + 12 + 631 + 7 + 8 + 1 = 666.

It is not a de Polignac number, because 5212631781 - 2⁶ = 5212631717 is a prime.

It is a super-2 number, since 2×5212631781² = 54343060168582463922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5212631731) 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, 41370031 + ... + 41370156.

Almost surely, 2^5212631781 is an apocalyptic number.

It is an amenable number.

5212631781 is a deficient number, since it is larger than the sum of its proper divisors (3392347771).

5212631781 is a wasteful number, since it uses less digits than its factorization.

5212631781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82740200 (or 82740197 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 5212631781 is about 72198.5580257667. The cubic root of 5212631781 is about 1733.8799150964.

The spelling of 5212631781 in words is "five billion, two hundred twelve million, six hundred thirty-one thousand, seven hundred eighty-one".