90022215961 has 2 divisors, whose sum is σ = 90022215962. Its totient is φ = 90022215960.

The previous prime is 90022215917. The next prime is 90022216003. The reversal of 90022215961 is 16951222009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88375398400 + 1646817561 = 297280^2 + 40581^2 .

It is a cyclic number.

It is not a de Polignac number, because 90022215961 - 2³¹ = 87874732313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90022215961.

It is not a weakly prime, because it can be changed into another prime (90022015961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45011107980 + 45011107981.

It is an arithmetic number, because the mean of its divisors is an integer number (45011107981).

Almost surely, 2^90022215961 is an apocalyptic number.

It is an amenable number.

90022215961 is a deficient number, since it is larger than the sum of its proper divisors (1).

90022215961 is an equidigital number, since it uses as much as digits as its factorization.

90022215961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 90022215961 in words is "ninety billion, twenty-two million, two hundred fifteen thousand, nine hundred sixty-one".