70507381 has 16 divisors (see below), whose sum is σ = 88266240. Its totient is φ = 54915840.

The previous prime is 70507357. The next prime is 70507387. The reversal of 70507381 is 18370507.

It is not a de Polignac number, because 70507381 - 2⁷ = 70507253 is a prime.

It is a super-2 number, since 2×70507381² = 9942581550958322, which 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 (70507387) 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, 6765 + ... + 13666.

It is an arithmetic number, because the mean of its divisors is an integer number (5516640).

Almost surely, 2^70507381 is an apocalyptic number.

It is an amenable number.

70507381 is a deficient number, since it is larger than the sum of its proper divisors (17758859).

70507381 is a wasteful number, since it uses less digits than its factorization.

70507381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20484.

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

The square root of 70507381 is about 8396.8673325235. The cubic root of 70507381 is about 413.1218775469.

Adding to 70507381 its reverse (18370507), we get a palindrome (88877888).

The spelling of 70507381 in words is "seventy million, five hundred seven thousand, three hundred eighty-one".