70221855 has 32 divisors (see below), whose sum is σ = 123211008. Its totient is φ = 33868800.

The previous prime is 70221841. The next prime is 70221869. The reversal of 70221855 is 55812207.

It is an interprime number because it is at equal distance from previous prime (70221841) and next prime (70221869).

It is not a de Polignac number, because 70221855 - 2¹⁰ = 70220831 is a prime.

It is a super-2 number, since 2×70221855² = 9862217839282050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33807 + ... + 35823.

It is an arithmetic number, because the mean of its divisors is an integer number (3850344).

Almost surely, 2^70221855 is an apocalyptic number.

70221855 is a deficient number, since it is larger than the sum of its proper divisors (52989153).

70221855 is a wasteful number, since it uses less digits than its factorization.

70221855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 70221855 is about 8379.8481489822. The cubic root of 70221855 is about 412.5634649826.

The spelling of 70221855 in words is "seventy million, two hundred twenty-one thousand, eight hundred fifty-five".