1216690501 has 8 divisors (see below), whose sum is σ = 1367251200. Its totient is φ = 1074268272.

The previous prime is 1216690483. The next prime is 1216690513. The reversal of 1216690501 is 1050966121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216690501 - 2⁹ = 1216689989 is a prime.

It is a super-3 number, since 3×1216690501³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216690571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2034301 + ... + 2034898.

It is an arithmetic number, because the mean of its divisors is an integer number (170906400).

Almost surely, 2^1216690501 is an apocalyptic number.

It is an amenable number.

1216690501 is a deficient number, since it is larger than the sum of its proper divisors (150560699).

1216690501 is a wasteful number, since it uses less digits than its factorization.

1216690501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069235.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 1216690501 is about 34881.0908803036. The cubic root of 1216690501 is about 1067.5626534973.

The spelling of 1216690501 in words is "one billion, two hundred sixteen million, six hundred ninety thousand, five hundred one".