1022155971 has 4 divisors (see below), whose sum is σ = 1362874632. Its totient is φ = 681437312.

The previous prime is 1022155961. The next prime is 1022155997. The reversal of 1022155971 is 1795512201.

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 1022155971 - 2²² = 1017961667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1022155921) 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, 170359326 + ... + 170359331.

It is an arithmetic number, because the mean of its divisors is an integer number (340718658).

Almost surely, 2^1022155971 is an apocalyptic number.

1022155971 is a deficient number, since it is larger than the sum of its proper divisors (340718661).

1022155971 is an equidigital number, since it uses as much as digits as its factorization.

1022155971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340718660.

The product of its (nonzero) digits is 6300, while the sum is 33.

The square root of 1022155971 is about 31971.1740635217. The cubic root of 1022155971 is about 1007.3314422659.

The spelling of 1022155971 in words is "one billion, twenty-two million, one hundred fifty-five thousand, nine hundred seventy-one".