31244142451 has 2 divisors, whose sum is σ = 31244142452. Its totient is φ = 31244142450.

The previous prime is 31244142403. The next prime is 31244142463. The reversal of 31244142451 is 15424144213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31244142451 - 2¹⁵ = 31244109683 is a prime.

It is not a weakly prime, because it can be changed into another prime (31244142491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15622071225 + 15622071226.

It is an arithmetic number, because the mean of its divisors is an integer number (15622071226).

Almost surely, 2^31244142451 is an apocalyptic number.

31244142451 is a deficient number, since it is larger than the sum of its proper divisors (1).

31244142451 is an equidigital number, since it uses as much as digits as its factorization.

31244142451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 31.

Adding to 31244142451 its reverse (15424144213), we get a palindrome (46668286664).

The spelling of 31244142451 in words is "thirty-one billion, two hundred forty-four million, one hundred forty-two thousand, four hundred fifty-one".