1022402155 has 4 divisors (see below), whose sum is σ = 1226882592. Its totient is φ = 817921720.

The previous prime is 1022402153. The next prime is 1022402231. The reversal of 1022402155 is 5512042201.

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

It is not a de Polignac number, because 1022402155 - 2¹ = 1022402153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022402153) 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, 102240211 + ... + 102240220.

It is an arithmetic number, because the mean of its divisors is an integer number (306720648).

Almost surely, 2^1022402155 is an apocalyptic number.

1022402155 is a deficient number, since it is larger than the sum of its proper divisors (204480437).

1022402155 is an equidigital number, since it uses as much as digits as its factorization.

1022402155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204480436.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1022402155 is about 31975.0239249324. The cubic root of 1022402155 is about 1007.4123069559.

Adding to 1022402155 its reverse (5512042201), we get a palindrome (6534444356).

The spelling of 1022402155 in words is "one billion, twenty-two million, four hundred two thousand, one hundred fifty-five".