2221386951 has 32 divisors (see below), whose sum is σ = 3413495808. Its totient is φ = 1258709760.

The previous prime is 2221386917. The next prime is 2221386997. The reversal of 2221386951 is 1596831222.

2221386951 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2221386951 - 2⁶ = 2221386887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221386151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2241066 + ... + 2242056.

It is an arithmetic number, because the mean of its divisors is an integer number (106671744).

Almost surely, 2^2221386951 is an apocalyptic number.

2221386951 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2221386951 is a deficient number, since it is larger than the sum of its proper divisors (1192108857).

2221386951 is a wasteful number, since it uses less digits than its factorization.

2221386951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791.

The product of its digits is 51840, while the sum is 39.

The square root of 2221386951 is about 47131.5918572670. The cubic root of 2221386951 is about 1304.7923610865.

The spelling of 2221386951 in words is "two billion, two hundred twenty-one million, three hundred eighty-six thousand, nine hundred fifty-one".