31213796 has 6 divisors (see below), whose sum is σ = 54624150. Its totient is φ = 15606896.

The previous prime is 31213753. The next prime is 31213799. The reversal of 31213796 is 69731213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18181696 + 13032100 = 4264^2 + 3610^2 .

It is not an unprimeable number, because it can be changed into a prime (31213799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3901721 + ... + 3901728.

It is an arithmetic number, because the mean of its divisors is an integer number (9104025).

Almost surely, 2^31213796 is an apocalyptic number.

It is an amenable number.

31213796 is a deficient number, since it is larger than the sum of its proper divisors (23410354).

31213796 is a wasteful number, since it uses less digits than its factorization.

31213796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7803453 (or 7803451 counting only the distinct ones).

The product of its digits is 6804, while the sum is 32.

The square root of 31213796 is about 5586.9308211217. The cubic root of 31213796 is about 314.8585776520.

The spelling of 31213796 in words is "thirty-one million, two hundred thirteen thousand, seven hundred ninety-six".