70552181 has 4 divisors (see below), whose sum is σ = 80631072. Its totient is φ = 60473292.

The previous prime is 70552151. The next prime is 70552211. The reversal of 70552181 is 18125507.

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 an interprime number because it is at equal distance from previous prime (70552151) and next prime (70552211).

It is a cyclic number.

It is not a de Polignac number, because 70552181 - 2¹⁰ = 70551157 is a prime.

It is a super-2 number, since 2×70552181² = 9955220487713522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70552151) 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, 5039435 + ... + 5039448.

It is an arithmetic number, because the mean of its divisors is an integer number (20157768).

Almost surely, 2^70552181 is an apocalyptic number.

It is an amenable number.

70552181 is a deficient number, since it is larger than the sum of its proper divisors (10078891).

70552181 is a wasteful number, since it uses less digits than its factorization.

70552181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10078890.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 70552181 is about 8399.5345704390. The cubic root of 70552181 is about 413.2093574737.

Subtracting from 70552181 its product of nonzero digits (2800), we obtain a triangular number (70549381 = T₁₁₈₇₈).

Adding to 70552181 its reverse (18125507), we get a palindrome (88677688).

The spelling of 70552181 in words is "seventy million, five hundred fifty-two thousand, one hundred eighty-one".