1216254031 has 16 divisors (see below), whose sum is σ = 1270886400. Its totient is φ = 1162677600.

The previous prime is 1216254023. The next prime is 1216254043. The reversal of 1216254031 is 1304526121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1216254031 - 2³ = 1216254023 is a prime.

It is a super-2 number, since 2×1216254031² = 2958547735847497922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1216253987 and 1216254005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216254931) 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, 1029261 + ... + 1030441.

It is an arithmetic number, because the mean of its divisors is an integer number (79430400).

Almost surely, 2^1216254031 is an apocalyptic number.

1216254031 is a deficient number, since it is larger than the sum of its proper divisors (54632369).

1216254031 is a wasteful number, since it uses less digits than its factorization.

1216254031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1216254031 is about 34874.8337773816. The cubic root of 1216254031 is about 1067.4349807105.

The spelling of 1216254031 in words is "one billion, two hundred sixteen million, two hundred fifty-four thousand, thirty-one".