612221497 has 16 divisors (see below), whose sum is σ = 632541312. Its totient is φ = 592300800.

The previous prime is 612221473. The next prime is 612221501. The reversal of 612221497 is 794122216.

612221497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 612221497 - 2¹¹ = 612219449 is a prime.

It is a super-2 number, since 2×612221497² = 749630322777842018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612221447) 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, 1816513 + ... + 1816849.

It is an arithmetic number, because the mean of its divisors is an integer number (39533832).

Almost surely, 2^612221497 is an apocalyptic number.

It is an amenable number.

612221497 is a deficient number, since it is larger than the sum of its proper divisors (20319815).

612221497 is a wasteful number, since it uses less digits than its factorization.

612221497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its digits is 12096, while the sum is 34.

The square root of 612221497 is about 24743.1100914982. The cubic root of 612221497 is about 849.1208890184.

The spelling of 612221497 in words is "six hundred twelve million, two hundred twenty-one thousand, four hundred ninety-seven".