212305152551 has 4 divisors (see below), whose sum is σ = 212663171952. Its totient is φ = 211947133152.

The previous prime is 212305152533. The next prime is 212305152559. The reversal of 212305152551 is 155251503212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212305152551 - 2²⁶ = 212238043687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212305152559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179008811 + ... + 179009996.

It is an arithmetic number, because the mean of its divisors is an integer number (53165792988).

Almost surely, 2^212305152551 is an apocalyptic number.

212305152551 is a deficient number, since it is larger than the sum of its proper divisors (358019401).

212305152551 is an equidigital number, since it uses as much as digits as its factorization.

212305152551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358019400.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 212305152551 its reverse (155251503212), we get a palindrome (367556655763).

The spelling of 212305152551 in words is "two hundred twelve billion, three hundred five million, one hundred fifty-two thousand, five hundred fifty-one".