70720151 has 4 divisors (see below), whose sum is σ = 71129112. Its totient is φ = 70311192.

The previous prime is 70720141. The next prime is 70720157. The reversal of 70720151 is 15102707.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 70720151 - 2⁶ = 70720087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70720157) 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, 204221 + ... + 204566.

It is an arithmetic number, because the mean of its divisors is an integer number (17782278).

Almost surely, 2^70720151 is an apocalyptic number.

70720151 is a deficient number, since it is larger than the sum of its proper divisors (408961).

70720151 is a wasteful number, since it uses less digits than its factorization.

70720151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408960.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 70720151 is about 8409.5273945686. The cubic root of 70720151 is about 413.5370192909.

Adding to 70720151 its reverse (15102707), we get a palindrome (85822858).

The spelling of 70720151 in words is "seventy million, seven hundred twenty thousand, one hundred fifty-one".