251213046451 has 2 divisors, whose sum is σ = 251213046452. Its totient is φ = 251213046450.

The previous prime is 251213046421. The next prime is 251213046517. The reversal of 251213046451 is 154640312152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251213046451 - 2¹³ = 251213038259 is a prime.

It is not a weakly prime, because it can be changed into another prime (251213046421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125606523225 + 125606523226.

It is an arithmetic number, because the mean of its divisors is an integer number (125606523226).

Almost surely, 2^251213046451 is an apocalyptic number.

251213046451 is a deficient number, since it is larger than the sum of its proper divisors (1).

251213046451 is an equidigital number, since it uses as much as digits as its factorization.

251213046451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 251213046451 in words is "two hundred fifty-one billion, two hundred thirteen million, forty-six thousand, four hundred fifty-one".