70215494 has 4 divisors (see below), whose sum is σ = 105323244. Its totient is φ = 35107746.

The previous prime is 70215479. The next prime is 70215499. The reversal of 70215494 is 49451207.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70215494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70215499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17553872 + ... + 17553875.

It is an arithmetic number, because the mean of its divisors is an integer number (26330811).

Almost surely, 2^70215494 is an apocalyptic number.

70215494 is a deficient number, since it is larger than the sum of its proper divisors (35107750).

70215494 is a wasteful number, since it uses less digits than its factorization.

70215494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35107749.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 70215494 is about 8379.4685989029. The cubic root of 70215494 is about 412.5510073441.

The spelling of 70215494 in words is "seventy million, two hundred fifteen thousand, four hundred ninety-four".