7212383381 has 4 divisors (see below), whose sum is σ = 8242723872. Its totient is φ = 6182042892.

The previous prime is 7212383377. The next prime is 7212383383. The reversal of 7212383381 is 1833832127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7212383381 - 2² = 7212383377 is a prime.

It is a super-2 number, since 2×7212383381² (a number of 21 digits) contains 22 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 (7212383383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515170235 + ... + 515170248.

It is an arithmetic number, because the mean of its divisors is an integer number (2060680968).

Almost surely, 2^7212383381 is an apocalyptic number.

It is an amenable number.

7212383381 is a deficient number, since it is larger than the sum of its proper divisors (1030340491).

7212383381 is a wasteful number, since it uses less digits than its factorization.

7212383381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030340490.

The product of its digits is 48384, while the sum is 38.

The square root of 7212383381 is about 84925.7521662305. The cubic root of 7212383381 is about 1932.0851743038.

The spelling of 7212383381 in words is "seven billion, two hundred twelve million, three hundred eighty-three thousand, three hundred eighty-one".