635542051 has 2 divisors, whose sum is σ = 635542052. Its totient is φ = 635542050.

The previous prime is 635542031. The next prime is 635542079. The reversal of 635542051 is 150245536.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-635542051 is a prime.

It is not a weakly prime, because it can be changed into another prime (635542031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317771025 + 317771026.

It is an arithmetic number, because the mean of its divisors is an integer number (317771026).

Almost surely, 2^635542051 is an apocalyptic number.

635542051 is a deficient number, since it is larger than the sum of its proper divisors (1).

635542051 is an equidigital number, since it uses as much as digits as its factorization.

635542051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 635542051 is about 25209.9593613318. The cubic root of 635542051 is about 859.7683038174.

Adding to 635542051 its reverse (150245536), we get a palindrome (785787587).

The spelling of 635542051 in words is "six hundred thirty-five million, five hundred forty-two thousand, fifty-one".