70317551 has 2 divisors, whose sum is σ = 70317552. Its totient is φ = 70317550.

The previous prime is 70317539. The next prime is 70317581. The reversal of 70317551 is 15571307.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70317551 - 2¹⁸ = 70055407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70317581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35158775 + 35158776.

It is an arithmetic number, because the mean of its divisors is an integer number (35158776).

Almost surely, 2^70317551 is an apocalyptic number.

70317551 is a deficient number, since it is larger than the sum of its proper divisors (1).

70317551 is an equidigital number, since it uses as much as digits as its factorization.

70317551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3675, while the sum is 29.

The square root of 70317551 is about 8385.5560936649. The cubic root of 70317551 is about 412.7507891549.

Adding to 70317551 its reverse (15571307), we get a palindrome (85888858).

The spelling of 70317551 in words is "seventy million, three hundred seventeen thousand, five hundred fifty-one".