70531819 has 12 divisors (see below), whose sum is σ = 76041504. Its totient is φ = 65382192.

The previous prime is 70531801. The next prime is 70531831. The reversal of 70531819 is 91813507.

It is a happy number.

It is not a de Polignac number, because 70531819 - 2⁵ = 70531787 is a prime.

It is a super-2 number, since 2×70531819² = 9949474982897522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70541819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14889 + ... + 19045.

It is an arithmetic number, because the mean of its divisors is an integer number (6336792).

Almost surely, 2^70531819 is an apocalyptic number.

70531819 is a deficient number, since it is larger than the sum of its proper divisors (5509685).

70531819 is a wasteful number, since it uses less digits than its factorization.

70531819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242 (or 4223 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 70531819 is about 8398.3223920019. The cubic root of 70531819 is about 413.1696016580.

The spelling of 70531819 in words is "seventy million, five hundred thirty-one thousand, eight hundred nineteen".