7215562157 has 4 divisors (see below), whose sum is σ = 7215754716. Its totient is φ = 7215369600.

The previous prime is 7215562121. The next prime is 7215562171. The reversal of 7215562157 is 7512655127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7512655127 = 67 ⋅112129181.

It can be written as a sum of positive squares in 2 ways, for example, as 6790748836 + 424813321 = 82406^2 + 20611^2 .

It is a cyclic number.

It is not a de Polignac number, because 7215562157 - 2¹⁸ = 7215300013 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 (7215562187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19844 + ... + 121757.

It is an arithmetic number, because the mean of its divisors is an integer number (1803938679).

Almost surely, 2^7215562157 is an apocalyptic number.

It is an amenable number.

7215562157 is a deficient number, since it is larger than the sum of its proper divisors (192559).

7215562157 is a wasteful number, since it uses less digits than its factorization.

7215562157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192558.

The product of its digits is 147000, while the sum is 41.

The square root of 7215562157 is about 84944.4651345807. The cubic root of 7215562157 is about 1932.3689808066.

The spelling of 7215562157 in words is "seven billion, two hundred fifteen million, five hundred sixty-two thousand, one hundred fifty-seven".