1216632154 has 8 divisors (see below), whose sum is σ = 1825316928. Its totient is φ = 608193180.

The previous prime is 1216632091. The next prime is 1216632161. The reversal of 1216632154 is 4512366121.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48532 + ... + 69199.

It is an arithmetic number, because the mean of its divisors is an integer number (228164616).

Almost surely, 2^1216632154 is an apocalyptic number.

1216632154 is a deficient number, since it is larger than the sum of its proper divisors (608684774).

1216632154 is a wasteful number, since it uses less digits than its factorization.

1216632154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122900.

The product of its digits is 8640, while the sum is 31.

The square root of 1216632154 is about 34880.2545002183. The cubic root of 1216632154 is about 1067.5455880580.

Adding to 1216632154 its reverse (4512366121), we get a palindrome (5728998275).

The spelling of 1216632154 in words is "one billion, two hundred sixteen million, six hundred thirty-two thousand, one hundred fifty-four".