7215827551 has 2 divisors, whose sum is σ = 7215827552. Its totient is φ = 7215827550.

The previous prime is 7215827539. The next prime is 7215827557. The reversal of 7215827551 is 1557285127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7215827551 - 2⁵ = 7215827519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7215827498 and 7215827507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7215827557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3607913775 + 3607913776.

It is an arithmetic number, because the mean of its divisors is an integer number (3607913776).

Almost surely, 2^7215827551 is an apocalyptic number.

7215827551 is a deficient number, since it is larger than the sum of its proper divisors (1).

7215827551 is an equidigital number, since it uses as much as digits as its factorization.

7215827551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196000, while the sum is 43.

The square root of 7215827551 is about 84946.0272820336. The cubic root of 7215827551 is about 1932.3926718619.

The spelling of 7215827551 in words is "seven billion, two hundred fifteen million, eight hundred twenty-seven thousand, five hundred fifty-one".