1961215269 has 16 divisors (see below), whose sum is σ = 2834049792. Its totient is φ = 1199210688.

The previous prime is 1961215237. The next prime is 1961215297. The reversal of 1961215269 is 9625121691.

It is not a de Polignac number, because 1961215269 - 2⁵ = 1961215237 is a prime.

It is a super-2 number, since 2×1961215269² = 7692730662717484722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1961215269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961210269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154029 + ... + 166274.

It is an arithmetic number, because the mean of its divisors is an integer number (177128112).

Almost surely, 2^1961215269 is an apocalyptic number.

It is an amenable number.

1961215269 is a deficient number, since it is larger than the sum of its proper divisors (872834523).

1961215269 is a wasteful number, since it uses less digits than its factorization.

1961215269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320476.

The product of its digits is 58320, while the sum is 42.

The square root of 1961215269 is about 44285.6101798316. The cubic root of 1961215269 is about 1251.7235464711.

The spelling of 1961215269 in words is "one billion, nine hundred sixty-one million, two hundred fifteen thousand, two hundred sixty-nine".