11031251551 has 2 divisors, whose sum is σ = 11031251552. Its totient is φ = 11031251550.

The previous prime is 11031251549. The next prime is 11031251557. The reversal of 11031251551 is 15515213011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11031251551 - 2¹ = 11031251549 is a prime.

Together with 11031251549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11031251557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5515625775 + 5515625776.

It is an arithmetic number, because the mean of its divisors is an integer number (5515625776).

Almost surely, 2^11031251551 is an apocalyptic number.

11031251551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11031251551 is an equidigital number, since it uses as much as digits as its factorization.

11031251551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 11031251551 its reverse (15515213011), we get a palindrome (26546464562).

The spelling of 11031251551 in words is "eleven billion, thirty-one million, two hundred fifty-one thousand, five hundred fifty-one".