215269791261 has 32 divisors (see below), whose sum is σ = 333593468928. Its totient is φ = 120934894080.

The previous prime is 215269791251. The next prime is 215269791271. The reversal of 215269791261 is 162197962512.

It is an interprime number because it is at equal distance from previous prime (215269791251) and next prime (215269791271).

It is not a de Polignac number, because 215269791261 - 2¹⁵ = 215269758493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215269791251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321820 + ... + 730826.

It is an arithmetic number, because the mean of its divisors is an integer number (10424795904).

Almost surely, 2^215269791261 is an apocalyptic number.

215269791261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

215269791261 is a deficient number, since it is larger than the sum of its proper divisors (118323677667).

215269791261 is a wasteful number, since it uses less digits than its factorization.

215269791261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409441.

The product of its digits is 816480, while the sum is 51.

The spelling of 215269791261 in words is "two hundred fifteen billion, two hundred sixty-nine million, seven hundred ninety-one thousand, two hundred sixty-one".