57007381 has 4 divisors (see below), whose sum is σ = 58220352. Its totient is φ = 55794412.

The previous prime is 57007369. The next prime is 57007387. The reversal of 57007381 is 18370075.

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 a de Polignac number, because none of the positive numbers 2^k-57007381 is a prime.

It is a super-2 number, since 2×57007381² = 6499682976958322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57007387) 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, 606415 + ... + 606508.

It is an arithmetic number, because the mean of its divisors is an integer number (14555088).

Almost surely, 2^57007381 is an apocalyptic number.

It is an amenable number.

57007381 is a deficient number, since it is larger than the sum of its proper divisors (1212971).

57007381 is a wasteful number, since it uses less digits than its factorization.

57007381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212970.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 57007381 is about 7550.3232381137. The cubic root of 57007381 is about 384.8667239820.

The spelling of 57007381 in words is "fifty-seven million, seven thousand, three hundred eighty-one".