381521722 has 8 divisors (see below), whose sum is σ = 572406516. Its totient is φ = 190719552.

The previous prime is 381521713. The next prime is 381521737. The reversal of 381521722 is 227125183.

It can be written as a sum of positive squares in 2 ways, for example, as 374074281 + 7447441 = 19341^2 + 2729^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7413 + ... + 28600.

Almost surely, 2^381521722 is an apocalyptic number.

381521722 is a deficient number, since it is larger than the sum of its proper divisors (190884794).

381521722 is a wasteful number, since it uses less digits than its factorization.

381521722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41312.

The product of its digits is 6720, while the sum is 31.

The square root of 381521722 is about 19532.5810378455. The cubic root of 381521722 is about 725.2812049066.

The spelling of 381521722 in words is "three hundred eighty-one million, five hundred twenty-one thousand, seven hundred twenty-two".